Rules that govern purchases made by the federal government’s executive agencies are known as Federal Acquisition Regulations (FARs). They’re available in the Code of Federal Regulations at 48 C.F.R. § 1 and at the FAR Home at Acquisition Central, the government’s website for the federal acquisition community and the government’s business partners. Acquisition Central also has the FARs available in a variety of downloadable formats, along with proposed rules, compliance guides, references and other pertinent information.
48 C.F.R chapters 2-99 contain the supplemental acquisition regulations of specific federal agencies. Acquisition Central has hyperlinks to each agency and its procurement regulation websites. These include the DFARs, the supplementary acquisition regulations of the Department of Defense (Military branches also have their own supplementary acquisition regulations.). The National Archives and Records Administration publishes most current titles of the C.F.R. online.
Ken Larson, a SCORE (Service Corps of Retired Executives) Volunteer Counselor, has a blog dedicated to small business federal government contracting. Deborah Kluge has a detailed website on doing business with the federal government and a blog on writing proposals for government grants and contracts.