Public laws are initially published as "Slip Laws" and later published in United States Statutes at Large, the permanent
collection of all laws and resolutions enacted during each session of Congress. The Statutes at Large is prepared and published by the Office of the Federal Register (OFR), National Archives and Records Administration (NARA).
Statutes at Large publishes "session laws" (in chronological order, by session of Congress)
Sample citation: 107 Stat. 77-89 (law appears in volume 107 in the Statutes at Large (Stat.), on pages 77-89.)
The United States Code is a consolidation and codification by subject matter of the general and permanent laws of the
United States.
Sample citation: 2 USC. Sec 431. 2010.
NOTE: the former states that “the permanent collection of all laws”, while the latter is just “a consolidation and codification by subject matter of the general and permanent laws of the United States.” It appears to me they can pick and choose which laws to codify. Emphasis mine
It is also interesting to note that the following are tagged “Organic Laws”
The Declaration of Independence - 1776
Articles of Confederation - 1777
Ordinance of 1787: The Northwest Territorial Government
Constitution of the United States
Analytical Index to the Constitution of the United States
All the above can be found at:
https://uscode.house.gov/browse/frontmatter/organiclaws&edition=prelim
