The first official publication of a statute is in the form generally known as the "slip law."
The Office of the Federal Register, National Archives and Records Administration, prepares the slip laws and provides marginal editorial notes giving citations to laws mentioned in the text and other explanatory details.
The marginal notes also give the United States Code classifications, enabling the reader immediately to determine where the statute will appear in the Code. Each slip law also includes an informative guide to the legislative history of the law consisting of the committee report number, the name of the committee in each House, as well as the date of consideration and passage in each House, with a reference to the Congressional Record by volume, year, and date.
A reference to presidential statements relating to the approval of a bill, or the veto of a bill when the veto was overridden and the bill becomes law, is included in the legislative history as a citation to the Weekly Compilation of Presidential Documents.