Each session law is assigned a number. In the Federal system, the first part of the number is the congress that passed the law.
Pub. L. No. 107-56
Here in the Federal example, the 107 refers to the 107th Congress. The second part of the number is the number of the law passed. So, here in the example, the 56 refers to it being the 56th law passed by the 107th Congress.
Session laws usually have official and unofficial publications.
United States Statutes at Large in print
The United States Statutes at Large is the official publication of Federal session laws. It is abbreviated Stat. in legal citation.
United States Statutes at Large on Bloomberg Law
Law students and faculty only.
United States Code Congressional & Administrative News on Westlaw
Combination of the Congressional Session Highlights, Executive, legislative, and congressional committee membership, U.S. Public laws, House and Senate reports from LH, Presidential proclamations, Executive orders, Presidential messages and signing statements, Legislative history table listing Public law number, Stat page, Bill no., House and Senate report nos., and Dates of passage. Includes documents from U.S. Code Congressional and Administrative News. Coverage varies by document type.
HeinOnline Session Laws Library
This library contains the session laws of all 50 U.S. states as well as Canada, Australia, Puerto Rico, Virgin Islands, and the D.C. Register. All states are current within 60 days of the printed publication, and all states are available back to inception!
Westlaw - Proposed & Enacted Legislation
Law students & faculty only.
Public Laws / Advance Legislative Service
Browse Sources > Statutes and Legislation > Public Laws/ALS (law students & faculty only)
USCS -- Public Laws on Lexis
Law students & faculty only
