The FAA regulates non-military air travel in the U.S. The FAA was created in 1958 as an independent agency called "Federal Aviation Agency," but the name was changed in 1967, when the FAA became a part of the Department of Transportation.
FAA regulations are published as Title 14 of the Code of Federal Regulations. The FAA posts current and historical editions of Title 14. You can also find Title 14 in the CCH Aviation Law Reporter and all print and electronic editions of the CFR (discussed in the "CFR" entry).
The FAA Web site also posts information about the agency & its officials, news releases, new FAA Regs plus Title 14, advisory circulars, bulletins, alerts, recent notices and other "Documents" (www.faa.gov).
The FAA posts a database of exemption rulings called the Automated Exemption System. The rulings grant or deny requests for exemptions from FAA regulations.
FAA decisions are searchable on Lexis back to November 1989 (TRANS;FAA).