Although we make every effort to assure that the information we provide is complete and accurate, it is not intended to take the place of published agency regulations. Regulations issued by the U.S. Department of Transportation and its Operating Administrations are published in the Federal Register and compiled in the U.S. Code of Federal Regulations (CFR). Copies of appropriate volumes of the CFR in book format may be purchased from the Superintendent of Documents, U.S. Government Printing Office, or examined at many libraries.

The regulations on this Web site are current as of September 1, 2005, with the exception of part 395 which was revised October 1, 2005. These regulations are updated quarterly. In the interim, view Final Rules for recent rulemaking changes.