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.