Federal Legislative History Research:
A Practitioner's Guide to Compiling the Documents and Sifting for Legislative Intent

By Richard J. McKinney* and Ellen A. Sweet**
Part of LLSDC's Legislative Source Book
© 2001 Law Librarians' Society of Washington, D.C., Inc. Last revised in September, 2019
See also Legislative Histories of U.S. Laws on the Internet: Free and Commercial Sources

Detailed Outline | Written Narrative
Introduction | The Legislative Process | Finding Already Compiled Histories
Compiling in Paper | Compiling Electronically | Compiling from Older Records
Sifting for Legislative Intent | Other Selected Web Sites | Bibliography of Law Journal Articles

Detailed Outline with Links to Written Narrative

A. Introduction: What Federal Legislative Histories Are and How They Are Used
    1. Compilation of related legislative docs that precede the enactment of a U.S. public law
    2. Used by federal agencies, attorneys and courts to interpret a law
        a. At the least tells you general purpose of a law or particular title in a law
        b. Usually harder to decipher legislative intent in smaller provisions in a law
    3. Controversy about relying on documents that are not enactments
        a. Many law journal articles written debating the merits of leg. histories
        b. Recent critics, textualists like Justice Scalia, have dampened use in courts
        c. See bibliography of selected law journal articles  

B. The Federal Legislative Process and Legislative History Documents 
    1. Typically a bill is introduced, numbered sequentially & referred to committee(s)
        GPO prints bill, and frequently an intro statement & sometimes the text, summary &
        correspondence in Cong. Record, especially on the Senate side)
    2. Possible committee action on bill (most see no action unless chair is sponsor/cosponsor)
        a. Possible subcommittee hearings and markup of bill. Amended bill not printed yet.
        b. Hearings usually published months later.
        c. Committee web sites usually have prepared testimony & archived webcasts.
        d. CQ Transcripts has prepared testimony & selected unofficial  transcripts
        e. Possible cmte hearings and markup - recent text of amdts avail. from CQ Roll Call
        f. Unofficial (CQ) & official summaries of markups may be available
        g. After markup, committee orders bill reported as amended; not yet officially reported
        h. May wait a day or weeks for official reported text & its accompanied cmte reports
        i. Committee report (numbered sequentially) has explanation/summary - key
    3. Bill is brought up by chamber leadership for floor action
        a. House Rules Cmte may submit resolution with specific rules for bill consideration
            (the resolution and an accompanying report is printed, resolution also printed in C.R.)
        b. House resolution on the rule will be debated and adopted before bill considered (C.R.)
        c. Senate will allow unlimited amdts & debate unless cloture motion adopted by 60%
        d. Senate will also take up by unanimous consent; House by Committee of the Whole
        e. The House or Senate considers, debates, amends and passes the bill (see C.R.)
        f. The "engrossed" bill (now called an Act) as passed is printed in the Cong. Record
    4. Bill (Act) is referred to the other chamber and is printed as referred by GPO.
        a. Similar process occurs in the other body - committee & floor consideration
        b. Other chamber may report & pass its own bill first (see Cong. Record).
        c. May then pass the referred bill deleting all after enacting clause & insert own bill.
        d. Usually they just pass the other chamber's bill or make few amdts before sending back.
        e. Sometimes GPO publishes engrossed amdts of the Act as passed by other chamber.
        f. If cannot agree a conference is requested, accepted, & conferees appointed (C.R.).
    5. Conferees deliberate, come to agreement - conference report submitted to both chambers
        a. Conference report containing agreed text & explanatory statement always in C. R.
        b. Conference report also published as a House report (sometimes also as Senate
        c. Conference report debated and agreed to by both chambers no amdts permitted (C.R.)
    6. Enrolled version of bill (Act) prepared, signed & sent to President
        a. Enrolled version not printed but available electronically (same pagination as law)
        b. President has 10 days (Sundays/holidays excluded) to sign, veto, or pocket veto bill.
        c. If President signs, may prepare a signing statement (see Compilation of Pres. Docs).
        d. Law becomes effective upon President's signature unless specified otherwise.
        e. Office of Fed. Register assigns public law # and statute pages (takes a few days).
        f. Few weeks or months later the law is published as a slip law in pamphlet form by GPO
           and later in United States Statutes At Large (same pagination as slip law).  

C. Finding Already Compiled Federal Legislative Histories 
    1. Borrowing from or going to a library that has the legislative history
        a. Union List of Legis. Histories by LLSDC, 2000; 2002 sup.; can also request on listservs
        b. Sources of Compiled Legislative Histories by Nancy Johnson (biennial)
        c. Federal Legislative Histories: An Annotated Bibliography by Bernard Reams, 1994 
    2. Selected legislative histories on Lexis, Westlaw, HeinOnline, LLSDC list on the Internet,
    3. Thousands of leg. histories on Proquest Leg. Insight & Westlaw's GAO Leg. Hist. file
    4. Microfiche leg. histories - IHS Fiche 1909-1978; CCH Microfiche 1979-88
    5.  U.S. Code Congressional and Administrative News (USCCAN - published by West)
        a. From 1941 contains all U.S. laws, Pres. docs, selected committee reports, indices
        b. From 1948 USCCAN committee reports & signing statements on Westlaw's LH file
        c. U.S.C.A. notes that reference USCCAN legislative histories can be misleading

D. Compiling a Comprehensive Federal Legislative History in Paper Format 
    1. Arrangement of docs – If bound, similar sized material usually bound together with ToC
        a. Slip law, conf rept, cmte reports, bills, debates, signing statement, hearings, misc. docs
        b. Arrangement may also be in chronological order, reverse chron. order, or by each title
        c. Some histories may be very short; others may be more than 30 volumes.
        d. Possible additional leg. material - unpublished bill drafts, cmte markup amendments,
            cmte markup descriptions, press releases, draft conf. report, conferee transcripts, news
            articles, correspondence, and reports from exec. agencies or CBO, GAO, & CRS
    2. CIS (now Proquest) Legislative Histories Index Volume - basis for compiling own legislative history
        a. From 1970 to 1983 back of annual abstract vol. has selected leg. history references
        b. From 1984 to latest year has separate vol. with detailed indexing across congresses
            with law summaries, cmte report abstracts, references to related bills & dates of floor
            consideration, abstracts of committee hearings, prints, and misc. material
        c. CIS leg. hist. may not have all you need; then again may have far more than you need
        d. CIS leg. hist. on Lexis - links to full text of many docs (CISLH file & Lexis Congressional)
    3. Obtaining the leg. docs - follow bills (H&S doc rooms) or beg, borrow, copy & buy
        a. GovInfo docs in PDF beginning with 104th Cong. - bills, reports, Cong. Rec.
        b. Federal depository libraries may have GPO microfiche (96th-106th Congresses)

E. Compiling a Federal Legislative History Electronically 
    1. Congress.gov, a service of the Library of Congress, is a good starting point
        a. Bill summaries/status back to 1973, bill texts 1993+, Cong Rec. 1995+, Repts 1995+
        b. No Boolean operators but results first given with exact phrase.
        c. Direct linking could be tricky; urls may change (GPO Access & THOMAS now gone)
    2. GovInfo - has PDF and TEXT documents
        a. Bill texts back to 1993, Cong. Reports 1995, Cong. Rec. 1995, many cmte pubs - 1997+
        b. Has search and advance search templates
        c. Adobe Acrobat Suite (fee) allows PDF document indexing, notations, book marking,
            highlighting, etc. - can download own history on a disc and e-mail relevant portions
    3. Lexis Advance 
        a. Has Cong. Record from 1995, Bill Tracking & Bill Texts from 1989, CIS Index from 1970,
            Cmte Reports from 1873, selected hearing transcripts & all written testimony from 1988..
        b. Boolean operators, multiple Congresses at once, key word in context.
            Also can subdivide Record into Congresses 101st, etc. or Senate, House, Digest, etc.
        c. Direct linking via Lexis is also possible, but not on Lexis Advance
    4. Westlaw
        a. Has CR back to 1985, selc. cmte repts (LH) from 1948, all reports (LH) from 1990,
        b. Boolean operators available; field searching, multiple Congresses at once
        c. Beware of direct links on Westlaw as WestlawNext urls have replaced 
    5. Other electronic sources – see "Internet & Online Sources of Legislative & Reg. Info."
        a. House and Senate web pages - good for committee hearing links, webcasts
        b. CQ Roll Call - from 1995, Archives 1989-94 (schedules, markups, bill text, tracking, analysis).
        c. Committee hearing transcripts - CQ transcripts

F. Compiling a Federal Legislative History from Older Records 
    1. Need to find out public law number (or statute number) and the bill number - key
        a. USC notes - examine, but beware when USC title has been recodified - more history
        b. Popular name tables, CCH Congressional Index (1943+), Final House Calendars
        c. USC tables show what sections of a public law go with what USC sections
        d. U.S. Statues At Large (& slip laws) gives brief legislative history cites from 1975
        e. U.S. Statutes At Large gives bill number reference in margin from 1904 forward
        f. Before 1904 (58th Cong.) use Legislative Reference Checklist: the Key to Legislative
           Histories from 1789 to 1903 by Eugene Nabors, 1982, Fred B. Rothman & Co.
    2. Congressional Record Index and the History of Bills and Resolutions - Key Tools
        a. History of Bills shows C.R. pages for intro, debates, cmte report numbers, etc.; 1867+
        b. Congressional Record Index will show related bills, remarks, etc.
        c. Congressional Record Daily Digest summary volume is available from 1947
        d. GovInfo has Cong. Rec. Index (from 1983); History of Bills (from 1993) (daily ed.)
    3. U.S. Congressional Serial Set - 1817 forward, has all committee reports
        a. Over 14,000 vols. contains all numbered congressional reports & documents
        b. CIS Serial Set Index (1789-1969, incl. Amer. State Papers: 1789-1817 & bill # index)
        c. Numerical Lists and Schedule of Vols. of the U.S. Serial Set (GPO/Hein 1933-1980)
        d. U.S. Serial Set supplement for the 97th Congress (1981-82)
        e. U.S. Serial Set Catalog (with Num. Lists & Schedule of Vols. - 1983-84 forward)
        f. Schedule of Serial Set Vols. (LLSDC.org from 1970)
    4. Text of old House and Senate bills, resolutions - LLSDC Union List of Leg. Docs
        a. Law Library of Congress & selected libraries (OCLC) have bills & res. on microfilm,
        b. Center for Legislative Archives/NARA - Old Cmte Bill files (20 to 30 years later)
        c. Federal depository libraries have bills on microfiche - 1979-2000 (96th-106th
        d. Proquest bill collection from 1789 (near complete)
    5. Congressional Globe, Register of Debates and Annals of Congress - pre 1874 records
        a. Note: these are generally not verbatim speeches - use related indices - many libraries
        b. Located on Library of Congress American Memory Project - (PDF) not word searchable
        c. House and Senate Journals - official minutes/no debate; have table of actions on bills
    6. Using Historical CIS Indices (available in paper & electronically) and Microfiche
        a. CIS Serial Set Index and CIS Serial Set on Microfiche (1789-1969)
        b. CIS Congressional Committee Hearings Index & Microfiche (1833-1969)
        c. CIS Unpublished Senate Committee Hearings Index & Microfiche (1823-1972)
        d. CIS Unpublished House Committee Hearings Index & Microfiche (1833-1958)
        e. CIS U.S. Congressional Committee Prints Index & Microfiche (1830-1969)
        f. CIS Senate Executive Documents and Reports Index & Microfiche (1817-1969)
        g. All Indices on Lexis, Lexis.com, LN Congressional, Cong. Master File I (CD)

G. Sifting for Legislative Intent Language in a Federal Legislative History 
    1. Summary of documents to examine in a legislative history, generally in order of priority
        a. Statute text followed by conf. report’s joint explanatory statement (if there is one)
        b. Committee reports relevant to legislation - House, Senate - Other bills & congresses
        c. Remarks, debates, summaries in the Cong. Record especially by principal sponsors
        d. Text of bills in various versions to see when provision got in and how different
        e. Witness statements in committee hearings especially by administering agency
        f. Other documents, prints and reports, signing statements, drafts, news articles, etc.
    2. Key - look for the point the provision entered the legislative process & ask questions
        a. Closely examine the provision and its context in the law and earlier bill versions
        b. Was it introduced that way? If so, were there introductory remarks? (usually in Senate)
        c. Was the provision commented upon in the hearings by the administering agency?
        d. Was it inserted in committee markup? Whose amdt? Was there a markup summary?
        e. Was it reported that way in committee? What did the cmte report say about provision?
        f. Did it come only from the Senate or House side? Was there other relevant legislation?
        g. Were references to provision in C.R. debates/remarks, especially by key sponsors?
        h. Was it introduced as a floor amendment and if so what did the amdt sponsor say?
        i. Did it appear first in the conf. report? What did the joint explanatory statement say?
        j. Were there references to provision when the House and Senate agreed to conf. report?
        k. Did the President issue a signing statement? Did key sponsors make later remarks?
    3. Electronic search methods for legislative intent language in recent legislation
        a. Search relevant phrases in all committee reports electronically - Congress.gov, GovInfo.gov,
            Lexis (U.S. Serial Set), Westlaw (Reports from 1948, GAO Leg. Hist 1927-1995),
        b. Search relevant phrases in electronic Congressional Record - Congress.gov, GovInfo,
            Lexis (from 1985), Westlaw (from 1985), CQ.com,
        c. Search relevant phrases in electronic bill texts - Congress.gov (from 1989), Govinfo from 1995),
             Lexis from 1989), Westlaw (from 1991), CQ Archives 87+, etc
        d. Search relevant phrases in available electronic hearing records - House & Senate cmte
            pages, GovInfo, Lexis, Westlaw, etc.
        e. Search relevant phrases in news (like Bloomberg BNA) and other document databases
        f. Note: electronic searches can take you beyond prescribed leg. history documents

Federal Legislative History Research: Narrative

by Richard J. McKinney* and Ellen Sweet**
© 2001 Law Librarians' Society of Washington, D.C., Inc. Last Revised in September 2019

Introduction | The Legislative Process | Already Compiled Histories | Compiling in Paper
Compiling Electronically | Compiling from Older Records | Sifting for Legislative Intent 
Other Related Web Sites  | Bibliography of Law Journal Articles

Introduction: What Federal Legislative Histories Are and How They Are Used

 Federal legislative histories are compilations of related documents to a specific U.S. public law that generally precede the law's enactment. These documents can include related committee reports (including the conference report), debates, earlier texts of the bill(s), floor amendments, congressional hearings, committee prints, and other documents. The history of the bill's (or bills') development is normally set out as well including related legislation in previous Congresses. These compilations and chronologies are usually compiled by in-house legislative librarians or legislative specialists in a law firm, agency, court, or publishing company. Occasionally, histories are also produced by congressional committees or by commercial publishers often with related laws. They are bound together or placed together in a file or loose-leaf binder, usually with a table of contents. In recent decades documents are digitally assembled or paper copies of older histories have been scanned and digitized. Legislative histories can be very extensive, especially for laws with many titles and sections and on legislative matters that may have been percolating over several congresses in various legislative measures.

Traditionally, the legislative history of a U.S. public law is looked to by federal agencies, attorneys and the courts in order to determine the congressional intent of a particular statute or one of its provisions, especially if the plain reading of the statutory text is somewhat ambiguous. Some U.S. laws state their purpose in a preamble of findings at the beginning, but most U.S. laws do not set forth their purpose in the text. At the very least, a legislative history will usually answer the general question about why Congress is making a particular law or particular title of a law. However, what Congress intended when they enacted a particular provision in a law or what they meant by a particular word or phrase in a law is usually harder to decipher.

In recent decades, many law review articles have been written that have debated the merits of relying on documents that are not themselves legislative enactments (see law journal bibliography). Many critics, like former Supreme Court Justice Antonin Scalia, advocate a strict textual interpretation of public laws. This criticism has lead to a dampening of the use of federal legislative histories in some federal courts (see "The Supreme Court’s Declining Reliance on Legislative History: The Impact of Justice Scalia’s Critique" by Michael H. Koby in v. 36 Harvard Journal on Legislation, pp. 369-395 (1999). None-the-less, legislative histories are still widely used today by the U.S. legal community as a means to further decipher the legislative intent of Congress. Even Justice Scalia has concurred in opinions that have strayed from a strict textual reading of the law (for instance see United States National Bank of Oregon v. Independent Insurance Agents of America (1993) 508 U.S. 439, noted at 12 U.S.C. 92 notes). 

The Federal Legislative Process and Legislative History Documents

In comprehending federal legislative histories it is important to know the general legislative process of how a bill becomes a law and the documents that normally accompany that process. For instance, all bills must be introduced by a member of Congress and are then referred to a committee or committees with jurisdiction over the bill's subject matter. Legislation written by the members of the President's Administration also follows this process and a committee chairman or ranking minority member may be asked to introduce such legislation "upon request". The text of the bill as introduced will be printed as a separate document by the Government Printing Office (GPO), usually a few days after its introduction. The text of a bill as introduced may also be included in the published committee hearing on the bill.

Introductory statements on a bill, accompanied perhaps by the text, summary, and related correspondence, may also be inserted into the Congressional Record by the bill's sponsor or cosponsor at the time of introduction. On the Senate side, since the 1970's, inserting introductory remarks into the Record has been the norm for most bills and they are occasionally inserted on the House side in the Extension of Remarks section of the Record. In any case, the Congressional Record will always publish a daily list of bills and resolutions introduced that day with the bill number, sponsor, original cosponsors, official caption (long title), and committees to which the bill is referred.

House and Senate bills are numbered sequentially within a Congress. A bill that has not been enacted during a two-year Congress dies at the end of the Congress and has to be reintroduced, usually with a new number, in the next Congress if it is to be considered. House and Senate resolutions are also numbered sequentially and go through a similar legislative process, but only joint resolutions (not simple or concurrent resolutions) can become law. For more details on Congressional bills, resolutions and other matters see LLSDC's Questions and Answers in Legislative and Regulatory Research.

A committee or a subcommittee may hold hearings on a bill (or related bills) or its subject matter, but most bills just languish in committee unless the bill (with some exceptions) is sponsored or cosponsored by the chairman of the relevant committee or subcommittee (chairmanships are controlled by the majority party within a chamber). Congressional hearings are generally published months after they occur but prepared statements and archived webcasts can often be acquired before that time from the committee Web site. Many unofficial transcripts of selected witnesses can often be acquired from the commercial service, CQ Transcripts or from other commercial databases that have contracts with them. Hearings are not published in the Congressional Record, but they are normally noted in the Congressional Record's Daily Digest, published as part of the Congressional Record since 1948.

Next, a committee or subcommittee may schedule a meeting to "mark up" (amend the bill by voting in committee) a bill and then refer it, as amended, to the full committee or to the full House or Senate. Subcommittee amended versions of bills that incorporate markup amendments do not get officially printed and subcommittee and committee amendments are sometimes made available on Committee websites.  In addition archived webcasts of committee mark-up sessions are sometimes placed on Committee websites for a period of time. However, when a committee changes hands from one political party to another much of what was previously on the committee site is no longer presented but may be on "the minority's" website.     

A draft of a bill, instead of a previously introduced bill, may also be "marked up" by a committee or subcommittee. These draft bills, frequently called "committee prints" complete with line numbers like other bills, are not officially published, but may be available from a committee Web site right before a scheduled mark up and for a period of time afterward. 

When a bill is approved by a majority of members of a full committee it is ordered reported by that committee (normally it's chairman) to the full House or Senate. However, before a bill is officially reported, a committee report to accompany the bill is usually prepared (especially on the House side) and only then is the bill reported and placed on the calendar as a possible measure to be considered by the full House or Senate. The committee report is a key component of a legislative history as it is there that an explanation and summary of a bill can be found. Sometimes it is many weeks later that a bill, which has been ordered reported, is officially reported to the House or Senate and printed in amended form with its accompanied report. The Congressional Record notes when a bill is officially reported and what the report number is of the report that accompanies the bill. These are both printed as separate documents by the Government Printing Office, and their texts do not normally appear in the Congressional Record itself. In recent decades House committee reports usually include the text of the bill as reported (in small print) at the beginning of the report. Like congressional bills, House and Senate reports are numbered sequentially within a Congress.

If a chamber's leadership decides to bring a reported bill to the floor, it can then be debated and amended. On the House side non-controversial legislation is usually considered under suspension of the rules -- with no amendments allowed. However, controversial legislation on the House side is normally accompanied by a report from the Rules Committee which governs how the bill is to be considered and what amendments will be allowed. A resolution to adopt the rule must first be passed by the House before proceeding with consideration of the bill. The text of the House resolution to consider the bill is published in the Congressional Record as well any accompanying debate and votes. The bill itself and any of the bill's amendments are then debated and voted upon with the debate transcript, the record of votes, and the text of the amendments placed in the Congressional Record.

Unlike those of the House, the rules in the Senate allow for unlimited debate on bills and their amendments unless the Senate 1) votes to table an amendment, 2) agrees to limit debate by unanimous consent (frequently done), or 3) agrees to close debate on a bill or amendment with at least 60% of duly sworn Senators voting to "invoke cloture".

Should a measure pass one chamber, a new version of the bill as passed is prepared and generally printed in the Congressional Record (usually on the day of passage, but sometimes a day or two later). The text of the bill as passed (now termed an Act) is called the engrossed version and it is available electronically. The act is then referred to the other chamber; and it is this newly received bill in the other chamber that is officially printed in paper form and it is then immediately referred to the committee with jurisdiction.

In recent decades, it is customary for the receiving chamber's committee to be working on its own bill with a similar subject matter. Frequently the committee may report its own bill and that bill is the one considered on the chamber floor. After they pass their own bill, it is then that they take up the bill referred from the other chamber, often deleting all after the enacting clause, and inserting the language of their own chamber's bill. This bill with its new amendments will then be sent back to the other chamber for consideration. The original chamber may agree to the new amendments and thus clear the bill for the President, or it may agree to the amendments with a few additional amendments of its own before sending it back.

If agreement can not be reached between the two chambers, then a conference is usually requested by one of them (sometimes immediately by the second chamber). The other chamber will then agree to a conference and conferees are appointed from both chambers. This committee on the conference will normally hammer out a compromise text accompanied by a joint explanatory statement and send it back to both chambers in a conference report. Earlier congresses frequently had a manager's statement from just the House side or no statement at all. Even recent conference reports, if time is critical, may contain no explanatory statement or only a very short one. Normally, an explanatory statement in a conference report is the first item to be reviewed in a legislative history. Conference reports, unlike standing committee reports, are always published in the Congressional Record and are given sequential House report numbers (in earlier congresses they may also be given Senate document or Senate report numbers) and published by GPO as such. If both chambers agree to the conference report (these deliberations are also recorded in the Congressional Record), the measure is cleared for the President. Most legislation that has cleared Congress does not need to go through a conference, but controversial legislation and appropriations measures typically require a conference.

The enrolled text of cleared legislation is prepared and signed by officers of the House and Senate and presented to the President, but it is not officially published. The enrolled version of a bill is available electronically and its page formatting (in PDF) will correspond exactly to the statutory page formatting it will have should the bill become law. On rare occasions, when a bill is quite large and a Presidential signature is needed right away, an enrolled text is not prepared. However, for political reasons it may take some time, even weeks, before an enrolled measure is presented to the President, but once it is presented the President then has ten days (starting at midnight on the day he receives it, but not including Sundays and holidays) in which to sign or veto the act. Many times when he signs the bill he will prepare a signing statement which is published in the Compilation of Presidential Documents. Unless the law specifies otherwise, the effective date of a law is the day the President signs it (the date of enactment). A specific provision in a law may also have its own effective date.

A few days after a law's enactment the Office of the Federal Register will assign a public law number and Statute At Large pages to a new act, and usually a few weeks later a new law will be published in pamphlet form (called a slip law) by the Government Printing Office. Since 1975 the form and pagination that this published slip law has will be exactly replicated when it is published as part of the United States Statutes At Large with U.S. Code citations in the margin of each new section of the law. The U.S. Code citations are assigned by the Office of the Law Revision Counsel in the U.S. House of Representatives, usually during the enrollment process. At the end of the text (also since 1975, but since 1963 for slip laws) will be brief legislative history notes, including bill numbers, committee report numbers, dates of floor consideration, and any Presidential signing statement citation to the Weekly Compilation of Presidential Documents.  

Finding Already Compiled Federal Legislative Histories

 If there is a tangible copy of a compiled legislative history of a specific U.S. public law the easiest way to obtain it is to borrow it from or go to a library that has already compiled it. The Union List of Legislative Histories, 7th Edition (2000) and 2002 supplement, published by Law Librarians' Society of Washington D.C., Inc. (LLSDC), contains an extensive list of thousands of legislative histories owned by member libraries. A list of many other federal legislative histories, published either by commercial firms or by a congressional committee with jurisdiction, can be found in Sources of Compiled Legislative Histories by Nancy Johnson (2014, William S. Hein & Co. and digitized on its subscription Web site, HeinOnline.org). Johnson’s publication includes references to many law journal articles discussing the legislative history of specific laws. Another resource is Federal Legislative Histories: An Annotated Bibliography and Index to Officially Published Sources compiled by Bernard D. Reams (1994, Greenwood Press). This work, now out of print, also has detailed descriptions of government produced legislative histories (usually committee prints). Once you find a published legislative history of the public law you are researching, you can search for that book on OCLC in order to find a library that may own it or you can purchase it from the publisher (assuming that it is still in print). You can also make requests for legislative histories on various law library listservs like LLSDC and LawLib.

However,it should be noted that for U.S. public laws since 1995 most of the materials needed to compile a legislative history can be obtained for free from the Congress.gov database of the Library of Congress, including downloaded PDF documents for bill texts, Congressional Record pages, and Congressional committee reports. In addition the GovInfo.gov database contains bill texts (from 1993), Congressional committee reports (from 1995), the Congressional Record (daily from 1995; bound edition from 1873), and Congressional committee hearings (from 2001 and many before that time). Links to some 150 compiled histories on the free Internet are also available on LLSDC's website Legislative Histories of Selected U.S. Laws on the Internet: Free Sources.

Commercially, thousands of legislative histories are now available electronically on the databases of Proquest Congressional Insight, Westlaw, and HeinOnline as well as bill histories and related links on the databases of LexisNexis, CQ Roll Call, and Proquest Congressional,  Proquest Legislative Insight includes thousands of comprehensive legislative histories from 1789 to near present Congress but does not include amendment texts and extraneous remarks), The Westlaw Fed-LH premium file has thousands of carefully compiled GAO legislative histories from 1927 to 1994. HeinOnline has hundreds of digitized legislative histories from Congressional committee prints and those from the collection of the law firm of Covington and Burling). For more details about these services see LLSDC's Legislative Histories of Selected U.S. Laws on the Internet: Commercial Sources as well Finding or Compiling Federal Legislative Histories Electronically and Federal Legislative History 101. In addition to these resources Tax Analysts, Inc. produces a electronic product that contains the committee reports on most all the tax legislation enacted since the 99th Congress (1985). Some other publishers and organizations may produce electronic legislative histories as well.

At various times certain commercial firms have also attempted to place full-text federal legislative histories on microform. Information Handling Service (IHS), in its Legislative History Service, compiled histories for selected U.S. public laws (primarily tax laws) from the 61st to 96th Congresses (1909 to 1979). IHS has a hard copy index, "The Legislative Histories Indexed Guide", that accompanies the collection. Another company, Commerce Clearing House (CCH), in its Public Laws - Legislative Histories Microfiche, compiled histories for all U.S. public laws from the 97th to the 100th Congress (1979 to 1988 - no hearings included). Various libraries around the country hold these microform collections (now out of print) and a search on the Online Computer Library Center (OCLC) may reveal those holdings.

By far the most commonly available federal legislative history collection is the one under the misleading title United States Code Congressional and Administrative News (USCCAN). Published by the West Publishing Company (now Thomson West) since 1941, USCCAN is a regular staple in most U.S. law library collections. This annual publication does not reproduce the U.S. Code, nor does it contain congressional and administrative news articles. However, it does reproduce the text of all U.S. public laws and provides some of the important legislative history material for most of those laws. These include explanatory statements to most related conference committee reports (but not those to appropriation bills), the selected texts of related reports from standing committees (no more than one), and all Presidential signing statements (since 1986), executive orders and Presidential proclamations. The service also contains references to companion committee reports and dates of consideration on the House and Senate floors (since 1964), legislative history tables (since 1964), as well as indices to subjects covered, to U.S. Code sections affected that year, and to popular names of public laws. There are also annual lists of House and Senate members, standing committees and their members, and the names and titles of the President's cabinet. In earlier volumes (1945-1954), there were lists of U.S. government agencies and information on their origins. From 1948 forward, conference report joint explanatory statements, committee reports and Presidential signing statements (since 1986) can be found on on Westlaw's legislative history files.

It is important to note that references to USCCAN legislative histories in West's popular United States Code Annotated (USCA) do not always contain relevant information to the specific U.S. Code section being referenced, especially if the public law's history being referenced is particularly large or complicated. USCCAN is a good starting point, but it is by no means all-inclusive for pertinent legislative documents.  

Compiling a Comprehensive Federal Legislative History in Paper Format

  The arrangement of documents in federal legislative histories may vary considerably, but they should generally contain the text of all of the important documents or at least cites to them. Documents in some histories are sometimes arranged in chronological order. Others are arranged in reverse chronological order and still others are arranged by document type, by each title in a public law, or some combination of the above. It is up to the discretion of the compiler how best to organize the related documents.

Large legislative histories that are bound usually will have similar sized documents bound together. In these histories the public law itself in pamphlet form, known as the "slip law", is usually placed at the beginning. The law may be followed by the similarly sized conference report (if there is one) and the related reports from standing committees. Frequently, related bills (as introduced, reported, and passed) are bound together. In a similar manner related remarks, debates, votes, amendments, bill texts, and Daily Digest pages, photocopied from the Congressional Record, are also bound together. With the Congressional Record pages might be placed a photocopy of the Presidential signing statement excerpted from the Weekly Compilation of Presidential Documents. Related committee hearings (sometimes published long after the law's enactment) are also usually bound together. Finally, other miscellaneous documents such as related committee prints (studies, side-by-side comparisons or early bill drafts), House and Senate numbered documents (usually accompanying a Presidential communication like a veto message) or Congressional Budget Office reports may be bound together. Because of the diverse and lengthy nature of many legislative histories it is important for the compiler to prepare a title page and a detailed table of contents (or chronology of actions) which can be placed at the beginning of each volume of the history. Some histories can be very short with only the law, the text of the bill, a few pages from the Congressional Record and with one or perhaps no reports. However, for some large public laws with multiple titles and perhaps a history in prior congresses, a compiled legislative history may be more than 30 bound volumes long.

To make compiling legislative histories easier, Proquest Congressional Information Service (CIS), has, since 1984, produced an annual legislative history volume that contains citations and abstracts to most of the aforementioned documents related to each U.S. public law of a non-ceremonial nature and to all public laws after 1998. In the annual volume each public law is summarized, related Congressional reports are abstracted, references are given to related bills as are references to the dates of consideration on the House and Senate floors (there are no CIS abstracts of debates). Related committee hearings and prints are abstracted, and citations may be given to other miscellaneous materials like Presidential signing statements. CIS legislative history volume accompany the annual CIS Index/Abstract volumes that cover all congressional committee hearings, reports, prints and documents. From 1970 to 1983, limited legislative history citations to each U.S. public law were placed in the back of annual CIS Index/Abstract volumes. CIS legislative histories have become a standard tool for compiling recent federal legislative histories; from 1970 forward, they can be found on the CISLH file on LexisNexis with hypertext links in recent years to the full text of bills, committee reports and Congressional Record pages with floor consideration. LexisNexis Congressional, available to academic institutions, also has CIS legislative histories with many hypertext links to related full text documents.

While the many documents cited in a CIS legislative history may seem like overkill, it is important to note that some CIS legislative histories may not be comprehensive enough. Left out are references to introductory and extraneous remarks and some bills referenced in the history may also have extensive legislative histories themselves with related committee reports and their own floor consideration, which are not noted. There are also other documents that relate to a law's legislative history that CIS legislative histories do not cite or abstract. These may include related published reports from a federal executive agency, the General Accounting Office, the Congressional Research Service of the Library of Congress, or another body. They may also include unpublished bill drafts, committee markup amendments, committee markup summaries, draft bill comparisons, and unofficial transcripts of conferee deliberations. Also outside the scope of CIS legislative histories are congressional press releases, correspondence, and news articles, any of which may have importance to a bill's legislative history and answer the question of why Congress did what it did. However, note that in a court of law, the further you stray from the actual text of the law, the less likely it will be acceptable to a judge.

Compiling a Federal Legislative History Electronically

  What if you need to produce a legislative history before CIS has produced its annual legislative history volume? As you may know, frequently attorneys and other patrons want those histories soon after a bill has been cleared for the President or even for bills that will never reach the President’s desk. What's a librarian to do? Fortunately, for recent Congresses, most of the material in a federal legislative history will be available electronically on Congress.gov, GovInfo or commercial services. You just have to do a little research to find out which documents relate to the bill or law in question. A near comprehensive guide to electronic sources available for this task is contained in the document "Internet and Online Sources of U.S. Legislative and Regulatory Information," found on the web page of LLSDC’s Legislative Source Book. Also on the Source Book is "Federal Legislative History 101."

Congress.gov, a free service of the Library of Congress, is a good starting point. It has a reasonably good bill summary and status tracking system (as far back as 1973). If you have a bill number you can easily obtain the references and links (from 1989; PDF from 1995) to bill texts, committee reports, Congressional Record pages of floor consideration and amendments, the companion bill in the other chamber, and even when hearings were held on your bill. Congress.gov bill action service will not tell you what someone said in testimony, nor when someone made extraneous remarks on a particular bill, or what are all the other bills and reports that may relate to the bill that was enacted. But you can do research on Congress.gov or on congressional committee web pages to obtain most of this information. One drawback in conducting research on Congress.gov is that it does not utilize Boolean terminology (and, or, near, etc.). Congress.gov has the full texts of bills from 1993 and the Congressional Record and congressional committee reports from 1995 forward. Congress.gov does not have hearings, but House and Senate committee websites will have prepared witness statements and frequently archived webcasts.  

GovInfo.gov is a free electronic document service of the U.S. Government Publishing Office, which is the legislative branch agency that publishes most congressional and many other government documents. Included on GovInfo are the Congressional Record Index and History of Bills from 1983 forward, History of Bills with page and date cites and bill texts from 1993 forward, the daily Congressional Record from 1994 forward, the bound Congressional Record from 1879 to near present, committee reports, and House and Senate documents from 1995 forward, selected committee prints from 1997 forward, and even many congressional committee hearings from 2001 forward as well as many from congresses. Some Boolean operators are available on GovInfo searches; phrase searches should be surrounded by quotation marks. As GovInfo documents are available in text and PDF formats (PDF stands for portable document format and looks just like the printed copy), you can print out most of the documents you need to compile a paper based legislative history. Moreover, using Adobe Acrobat Suite software (the fee-based software, not the Acrobat Reader you can just download) PDF documents can be indexed, highlighted, book-marked, and manipulated in ways so that a near-entire legislative history can be downloaded with portions highlighted and book marked.
You can also assemble a federal legislative history electronically using LexisNexis research software or its sister service Lexis Advance, Lexis has Boolean operators, segment searching, and is able to search across congresses or an individual congress. The Lexis Cong. Record file goes back to 1985 and its Bill Track and Bill Text files go back to 1989. Lexis has committee reports from 1990 to the present and its committee print file goes back to 1995. It also has Federal News Service transcripts and testimony of selected congressional hearings from August of 1988 forward. The CIS Index/Abstract service and the CIS Legislative History service, discussed above, are also available on Lexis from 1970 forward. Lexis has other relevant information as well, and most of these congressional resources and the above mentioned files can be searched and documents downloaded and assembled into an electronic legislative history. Direct linking to documents on Lexis.com is possible, but not on Lexis Advance. 
WestlawNext (Westlaw Classic was retired in May 2015) has extensive legislative files that can be used to compile electronic federal legislative histories. It has Congressional committee reports, public laws and other materials from 1948 to the present in its U.S. Code and Congressional Administrative News (USCCAN) as well as the Congressional Record from 1985 to the present (non-PDF, boolean searchable text of the daily edition), and ithas Congressional bill texts from 2009 to the present. Through an arrangement with CQ Roll Call WestlawNext has selected Congressional transcripts from 1994 to the present and in another arrangement WestlawNext has digitized into PDF all the thousands of legislative histories of the U.S. Government Accountability Office (GAO) from 1925 to 1995. 

There are other electronic sources for compiling federal legislative histories including the extensive files on CQ Congressional Roll Call CQ.com. CQ has news services as well as committee schedules, committee markup summaries and extensive archives back to 1989 with bill tracking, bill texts, committee reports and Congressional Record files. CQ also links to many remarks on legislation in the Congressional Record that is not noted by other services. The CQ Weekly Report, the CQ Annual Almanac (not available electronically) and other CQ news services are also extremely valuable in obtaining an understanding of legislative measures. 

Of course, House and Senate committee Web pages frequently have committee hearing testimony and transcripts (especially on the House side) back to the 105th Congress (1997). However, there is no guarantee that committees will retain information from a previous Congress. Information on these Web pages is provided in LLSDC's Legislative Source Book under Quick Links to House and Senate Committee Documents and Hearings. You can generally find a link to a specific hearing or witness statement to add to a legislative history, but the search capability is limited and generally depend upon your browser's "Edit/Find" functions. In addition to official government testimony and transcripts of congressional hearings there are unofficial transcripts published selectively by the CQ Transcriptswire and audio or video recordings from C-Span.org.

Compiling a Federal Legislative History from Older Records

In compiling legislative histories for older (pre 1970) U.S. public laws, the first priority is to find the public law number (or statute citation) and from it the bill number that was signed into law which you can use as a key to find the legislative actions on the bill. If you know the popular name of an Act you can generally find its public law number in the Popular Names Table of United States Code (U.S.C.) or in the Popular Name table of the commercially produced United States Code Annotated (U.S.C.A.) or the United States Code Service (U.S.C.S.). The table or the index to the Code will also cite to the U.S. Code sections where each part of a law that is general and continuing was assigned by the Office of the Law Revision Counsel of the U.S. House of Representatives according to its subject matter. The parenthetical note following each U.S. Code section will tell you what public laws amended or established that section and further historical notes will briefly explain how each amendment changed that section.

Be careful in using notes within U.S. Code titles that have been revised, codified and enacted into positive law, as any public law citations in notes to them will only go back as far the Act which established the new codification. Reviser notes to these sections will tell you which acts (and which older Code sections) the new section came from but not how each changed the section (see page 3 of United States Code: Historical Outline and Explanatory Notes). These officially codified titles are not intended to change the law. The Office of the Law Revision Counsel in the U.S. House of Representatives, which prepares U.S. Code revisions, will generally only reorganize and perhaps rephrase the law to make it more coherent and consistent. Thus in order to find the true statutory origin of a certain section of the Code for which a title has been officially codified (and the appropriate laws to research for legislative history purposes) you will need to check that section's revision notes to find the older Code section(s) and statutes from which it was derived (they sometimes reuse the older Code sections). You may then want to obtain a copy of an earlier Code before it was codified into positive law and review the text of the earlier code section as well as any historical notes explaining amendment changes over time. The titles of the U.S. Code that have been revised, codified and enacted into positive law include titles 1, 3, 4, 5, 9, 10, 11, 13, 14, 17, 18, 23, 28, 31, 32, 35, 36, 37, 38, 39, 40, 44, 46, 49, 51, and 54. Also, Title 26, although not enacted, mirrors the Internal Revenue Code, which has been enacted into positive law. For further information see United States Code: List of Positive Law Titles with Enacting Cites and Location to Revision Notes.

If you have the public law number (used officially since 1957 but applied uniquely to U.S. public laws since 1908), then from it you can access a variety of sources to find the bill number that was enacted and from it find the chronologies of actions taken on the bill. These include the biennial CCH Congressional Index which is a loose-leaf service published since 1941 with a chronological history on each bill (including, what few other indices note, the committee and beginning date that hearings were held on a bill). There is also the final House Calendar published for each Congress since the 1920's (officially called Calendars of the United States House of Representatives and History of Legislation: Final Edition), which shows a chronology on each bill having some action. Another reference tool is the Digest of Public General Bills and Resolutions, produced from 1955 to 1989 by the Library of Congress Congressional Research Service (CRS). This publication series includes summaries and floor action listings on each measure introduced from the 84th Congress to the 101st Congress. The Library of Congress Internet service, Congress.gov, continues to make these CRS summaries and floor action listings available for each bill and resolution from 1973 to the present and from 1979 to the present the service includes detailed bill status chronologies (with committees and dates of hearings noted).

A convenient source for legislative history references is in the notes of the United States Statutes At Large. Since 1975 the Statutes At Large gives brief legislative history references on the final page to each U.S. public law, including bill numbers, committee report numbers and dates of floor consideration or passage. The bill number or joint resolution that was enacted into law is also placed in the margin at the beginning of each law included in the Statutes At Large since 1904. Information on corresponding bill numbers for U.S. laws prior to 1904 (the 58th Congress) are laid out in a publication by Eugene Nabors entitled Legislative Reference Checklist: the Key to Legislative Histories from 1789 to 1903, Fred B. Rothman & Co., 1982 (no longer in print but available in the HeinOnline's Legislative History Library). The U.S. Statutes At Large is available from 1789 in PDF on certain commercial databases including HeinOnline, Lexis, and Westlaw and from 1789 to 1875 in the American Memory Project of the Library of Congress.  Committee reports that accompany many bills may also have a section that shows how existing law would be changed by the committee's proposed legislation.

However, probably the key tool for finding related legislative history documents to U.S. public laws before 1970 is the bound "Congressional Record Index", especially its accompanying "History of Bills and Resolutions". The index and history of House and Senate bills has been produced for each congressional session since the Congressional Record began in 1873. It is generally placed in the last (or second to last) part in the bound volume series of the Congressional Record that is published for each congressional session. Usually each congressional session covers one year, but before 1941 a biannual Congress frequently had more than two sessions and sessions did not normally begin in January. See Sessions of Congress with Corresponding Debate Record Volume Numbers.

The "Congressional Record Index" and the "History of Bills and Resolutions" are available on GPO's GovInfo from 1983 (98th Congress) forward, but for the daily edition only, which has a completely different pagination from the bound edition. Since 1967, the daily edition of the Congressional Record has placed a letter in front of the page number signifying different sections -- S for Senate section, H for House section, E for Extension of Remarks section, and D for Daily Digest section. In contrast, the bound edition is in straight numeric pagination and integrates House and Senate pages together on a daily basis. Before 1968, the daily edition was also in straight numeric pagination but the page numbers do not correspond to the page numbers in the bound edition. Also before 1968 the Extension of Remarks section (usually only inserted by members of the House) was published as an appendix to the Record which in the past was not always included in the bound Congressional Record (see An Overview of the Congressional Record and Its Predecessor Publications). The daily edition of the Congressional Record is available electronically on GovInfo from and on Congress.gov from 1995 and in searchable text on both Lexis and Westlaw from 1985 forward, and from 1980 on HeinOnline. The bound Congressional Record and its predecessor publications is available online commercially on HeinOnline and Proquest.  GovInfo has available the a digital bound edition from 1999.

The "History of Bills and Resolutions" at the end of each index provides Congressional Record page numbers (but no the dates before 1993) for actions on a specific bill. Noted are page numbers for when a bill is introduced, reported from committee (with the report number) and considered on the House or Senate floors. It also notes the conference report number and the page numbers in the Record showing where the conference report was considered as well as page numbers noting when House and Senate officials signed the enrolled bill just before sending it to the President. Finally, it gives the page number noting when a bill was signed into law and the public law number. Frequently the page numbers noting House or Senate floor consideration only present the beginning page number but consideration could have continued for multiple pages. The "History of Bills and Resolutions" does not note committee hearings or companion measures in the other chamber or similar measures introduced in the same chamber. However, the "Congressional Record Index" of subjects and names will assist you in finding related measures and remarks not noted in the "History of Bills and Resolutions".

The "Congressional Record Daily Digest" volume part, placed at the end of each Congressional Record volume after 1947, summarizes daily floor action and notes committee actions and hearings for that day. The text of committee hearings and committee reports are not normally placed in the Congressional Record with the exception of conference reports and occasional excerpts of congressional testimony. The text of committee hearings and committee prints are published as separate paper bound copies (tan outside binding for large House hearings and green for Senate). Although committees may number their hearings and prints in a series, they are normally published in single paper bound copies. Some hearings may be only some 20 or 30 pages in length while others that were held over many days may be issued in a number of volumes or parts and each part may be several hundred pages in length.

Unlike congressional hearings, most all numbered committee reports and House and Senate numbered documents are placed in the voluminous United States Congressional Serial Set, which has been published since 1817 and now has over 14,000 volumes. As committee reports and other documents are considered critical to most legislative histories, the U.S. Serial Set is of immeasurable value in legislative research. If you are able to obtain a committee report number you can take that number and look it up in an index to find out which volume of the U.S. Serial Set contains the specific report or document you need. Indices to the U.S. Serial Set include the CIS U.S. Serial Set Index (1789-1969) which now has a very useful bill number index arranged by Congress. Also there is the "Numerical Lists and Schedule of Volumes" published by GPO for the years 1933-1980 (73rd - 96th Congresses) and republished in three volumes by William S. Hein & Co. A U.S. Serial Set supplement was published by GPO for the 97th Congress (1981-1982) with an addendum entitled "Numerical Lists of the Documents and Reports". Beginning with the 98th Congress (1983-1984), GPO has produced a catalog volume of all documents and reports issued each cxongress. It is entitled United States Congressional Serial Set Catalog. At the start of each volume is a "Numerical List of Documents and Reports" and a "Schedule of Serial Set Volumes".  The schedule of volumes of the U.S. Congressional Serial Set from 1970 to the present as well an overview of the Serial Set is available on LLSDC's Legislative Source Book.

Sometimes the text of bills as introduced is reprinted in related hearing documents, but usually in order to obtain the text of old congressional bills and resolutions you generally have to go to a microform set of them. However, in 2013 Proquest created a digital library of most Congressional bills from 1789 to the present.  The Law Library of Congress has two sets of Congressional bills on microform and also maintains a bound hardcopy set of most all Congressional bills from the 6th Congress forward. Some libraries around the country have also acquired these microform sets, and a search on OCLC with the phrase "bills and resolutions" should reveal most of those libraries.  Finally, between the 96th Congress and the 106th Congress (1979-2000) the Government Printing Office has published all House and Senate bills on microfiche with a final cumulative finding aid for each congressional session. Many federal depository libraries around the country have this series in their depository collection. See Sources for the Text of Congressional Bills and Resolutions.

Thousands of bill files from previous congresses are maintained at the Center for Legislative Archives of the National Archives and Records Administration (1-202-501-5350). Pursuant to congressional instructions, most Senate archives are available to researchers after 20 years have past and most House archives are available after 30 years. The documents generally come from congressional committees but the quality and quantity of material sent to the National Archives may differ significantly according to the policies and practices of a chamber and those of the committee at the time they are sent. The papers of individual members of Congress are not sent to the National Archives but may be stored in local libraries or other establishments. At the Center, those researching the legislative history of a public law may find the text of related bills as well as correspondence to a House or Senate committee concerning it. The Center is also likely to have committee hearings and other documents related to the legislation.

Before the government began publishing the Congressional Record in 1873 there were various private publishers of congressional proceedings and debates. The most noteworthy of these are the Annals of Congress (1789-1824, published retrospectively by Gales and Seaton), the Register of Debates (1824-1837, published each session by Gales and Seaton), and the Congressional Globe (1833-1873, published weekly by Blair and Rives). The debates in these publications were often news summaries or selected speeches (sometimes called sketches) rather than verbatim remarks and each volume (normally organized by congressional session) has an attached index. The Library of Congress has optically scanned these early records in its American Memory Project's A Century of Lawmaking For a New Nation. Although generally legible, these optically scanned documents (with quite small print) are not full text searchable, but they do have various indices as "navigators" to the system. Many libraries around the country also hold these old series in paper or microform. Bear in mind that in researching the legislative history of public laws before the 20th Century, these early debate records were often the only sources that might explain the legislative intent of Congress in enacting a particular law or one of its provisions.

The Constitution of the United States (Article I, section 5) requires that congressional proceedings be published in a House Journal and a Senate Journal, but these journals, still being published since 1789, do not reproduce any congressional debate. The journals merely publish the daily minutes on what measures were introduced, what measures passed, what appointees were confirmed, what communications were received, what votes were taken, and so on. However there is an index to each journal volume and a tabular index showing what actions were taken on bills and resolutions and on what page number of the journal that action is related. Since predecessor publications to the Congressional Record did not (until 1867) have any history of bills and resolutions, these journals can be an aid in early legislative history research, but for the most part the contents of the journals are covered in the Congressional Record. Before 1954 House and Senate journals were published as part of the U.S. Congressional Serial Set. Indices to the House Journal are available on GPO Access from 1991 to the last completed Congress.

For researching early Congressional documents, there is no substitute for the legislative indices produced by the Congressional Information Service (CIS) and now under Proquest Congressional umbrella. Proquest also supplies the CIS Microfiche Library of full-text documents in microfiche of items cited in its indices. For instance there are the CIS U.S. Serial Index and the CIS Serial Set on Microfiche (1789-1969). The new Part 13 (in four volumes) to the Serial Set index is organized by bill number in each Congress and shows related report numbers, even to reports (1817-1845) that may not have originally included the bill number to which they pertain. Proquest has digitized (in PDF) its CIS Serial Set microfiche (1789-1969) so that congressional reports associated with bills that were enacted can be easily accessed by public law number (only available on LexisNexis Congressional). There is also the CIS Congressional Hearings Index and Microfiche (1833-1969), the CIS Unpublished Senate Committee Index and Microfiche (1823-1972), the CIS Unpublished House Committee Hearings Index and Microfiche (1833-1958), the CIS Congressional Committee Prints Index and Microfiche (1830-1969), and the CIS Senate Executive Documents and Reports Index and Microfiche (1817-1969). Most of these indices and documents are available online on Proquest Congressional. 

Many older legislative documents including bills, reports, hearings, the Congressional Record and other items, can also be located in the federal depository libraries, as well libraries in law firms, federal agencies, U.S. courts, universities, and local governments around the country. For information on such documents in libraries in the Washington, D.C. area, see LLSDC's Union List of Legislative Documents.  

Sifting for Legislative Intent Language in a Legislative History

In determining congressional intent the greatest weight is almost always accorded to the plain meaning of a statute. Legislative histories to laws are used to help clarify the meaning of a statute, especially when that meaning is in doubt. Although there is considerable variation, generally, in a legislative history of a U.S. public law, the greatest weight is usually accorded to the joint explanatory statement in a bill's conference report (when there is one) followed by the explanations and summaries in committee reports. Next, congressional debate or remarks, especially by the bills' principal sponsors or floor managers, are usually accorded stature followed closely by the text of the bill(s) as it developed from earlier versions (differing language may show intent). Then congressional hearings and statements of witnesses (especially witnesses from agencies that may implement the law) have bearing followed by committee prints (studies or drafts of pre-introduced legislation) and markup amendments and other documents in committee (not usually published). When no explanations are available from official sources sometimes secondary source material, like news articles, may be accorded some weight as to why Congress is taking a particular action in a federal law.

Usually the easiest way to find relevant material on a particular provision is to first find the point that the provision got into the law's (or bill's) development and then look for documents associated with that point. First, closely examine the provision and its context in the law and in earlier bill versions. Then ask pertinent questions. Was it introduced that way, and if so did the sponsor have any introductory remarks on the issue (usually on the Senate side and sometimes on the House side in the Extension of Remarks)? Was it favorably received by the administering agency in their testimony or did they suggest amendments that were subsequently adopted? Did it first appear when the committee reported the bill? Is there a committee amendment markup summary to the bill? What did the accompanying committee report say about the bill or it's provisions? Was there a section-by-section summary in the committee report? Did it only come up in one chamber (House or Senate) or in both chambers? Were there other relevant legislative measures or reports in the current Congress or in prior congresses? Were there any references to it in the Congressional Record debates or in a member's inserted remarks? Was it introduced as a floor amendment and if so what did the amendment sponsor say on the floor? Did it appear first in the conference report? What does the joint explanatory statement in the conference report say about it? Were there other references to the provision when the House and Senate agreed to the conference report on the bill? Did key sponsors or floor managers make other remarks or explanatory summaries? Did the President make a statement when signing the legislation into law (see Compilation of Presidential Documents)? These and other questions are ones that should be asked when sifting for language of legislative intent.

In recent years searching for legislative intent language became much easier by the ability to perform word searches using electronic databases. Language in committee reports (including conference reports) can be searched across multiple reports and Congresses on various services including WestlawNext (back to 1948e), Lexis (back to 1990), Congress.gov (each Congress back to 1995), GPO Access (each Congress back to 1993), and CQ.com (each Congress back to 1989). Language in the daily edition of the Congressional Record can also be searched all at once in various services including WestlawNext (back to 1985), LexisNexis (back to 1985), Congress.gov (by Congress back to 1995 with pland back to 1989), GPO Access (by Congress back to 1994), and CQ.com (CQ Archives by Congress back to 1989).

These same electronic services are also available to search across the text of bills and resolutions for particular words or phrases. This may be helpful in determining what other measures may have had similar provisions or what bill versions first saw the appearance of a particular provision. For free, Congress.gov has the full text of bills from 1995 forward with plans to make it 1989 forward. It is searchable for each Congress beginning with the 104th (1995). GPO Access also has the full text of bills and they can be searched across Congresses beginning with the 103rd Congress. LexisNexis has full text of bills searchable by each Congress from 1989 forward and WestlawNext has full text of bills searchable across Congresses from 1991 forward, not including the present Congress. CQ Archives has the full text of bills searchable by each Congress, starting with the 100th Congress (1987).

As noted above there are now ways to search electronically for legislative intent language in Congressional hearings, For instance, the advance search feature on GovInfo can search the contents of almost all  Congressional hearings published since 1999 (106th Congress) along with many other hearings published before that time.  Also, the Haithi Trust Digital Library has millions of digitized books and thousands of Congressional hearings that are searchable before and after 1999. Commercially, the Proquest Congressional Digital Hearings Collection is a near comprehensive way to search the text and metadata of most all published and unpublished Congressional hearings.  In addition, Congressional committee websites generally make available prepared written statements and archived webcasts of recent Congressional hearings.  LLSDC's Legislative Source Book website "Quick Link Sources to House and Senate Committee Hearings and Other Publications" is a good source to use to quickly find these documents on both GPO Access and committee web sites. Finally, there is CQ Transcripts service, which provides transcripts of speeches, press conferences, and other news events. For Congressional hearings it makes available in electronic form all prepared written statements and selectively makes available transcripts of the oral testimony delivered by certain Congressional witnesses such as the heads of cabinet agencies and other significant individuals. In addition, the C-SPAN video library provides free live and archived videos of Congressional hearings and floor debates. .

Electronic searching for legislative intent can also be done on the above services across several Congresses or even on omnibus news databases and on specialized newsletters like those located on Lexis, Westlaw, Dow Jones, and Bloomberg BNA. Such searches can take you far beyond the documents prescribed in a public law's compiled legislative history. But sometimes it is these searches that turn up related legislation and explanations of actions not covered (or not easily found) in a normal legislative history. For researchers interested in finding any explanation of legislative intent for the smallest provision of a law such searches may indeed prove fruitful. However, in a law's interpretation, courts are not likely to give much weight to non-legislative documents or to legislative documents far removed from the original legislation. On the other hand, to a federal agency that must construe the intent of Congress when proposing implementing regulations stemming from a law, or to a third party commenting on those proposed regulations, any support from a law's legislative history may prove persuasive.

So Good luck in hunting, compiling, and sifting those documents.

Other Selected Websites on Federal Legislative History Research

Boston University Law Library - Federal Legislative History Research Guide
Congress.gov - The Legislative Process (script & video presentations)
Congress.gov - The Legislative Process - Enactment of A Law by Robert B. Dove 
Congress.gov - The Legislative Process - How Our Laws Are Made
Duke University School of Law Library - Federal Legislative History
Congressional Research Service - Introduction to the Legislative Process in the U.S. Congress
Congressional Research Service - Statutory Interpretation: General Principles and Recent Trends
Georgetown Law School Library - Legislative History Research Tutorial
GovInfo.gov - Browse Categories of Congressional Resources ad Documents
Harvard Law School Library - Federal Legislative History
HeinOnline U.S. Legislative History Library (subscription service with hundreds of histories)
Law Library of Congress - Federal Legislative History
LLSDC's Legislative Source Book - Federal Legislative History 101
LLSDC's Legislative Source Book - Legislative Histories of Selected U.S. Laws on the Free Internet
LLSDC's Legislative Source Book - Legislative Histories of Selected U.S. Laws on the Commercial Internet
Michigan State University Libraries - U.S. Federal Legislative Information
Northwestern University Law Center - U.S. Legislative History
Proquest Legislative Insight (subscription to thousands of compiled histories since 1789)
United States House of Representatives - The Legislative Process
University of California Hastings Law Library - Federal Legialative History Research Guide
Westlaw Resources for Legislative History Research (subscription service; also has thousands of digitized GAO legislative histories, 1925-1995)

Bibliography of Law Journal Articles Concerning Federal Legislative History

See link in PDF of the Bibliography of Law Journal Articles

* Richard McKinney is a retired Federal law librarian in Washington, D.C. 
** Ellen Sweet is Legislative Reference Specialist, Tax Division, Department of Justice, Washington, D.C.

Please email your questions or comments to the Legislative SIS.

Last major update was in September, 2019.