CFR Title 49 - Transportation (Code of Federal Regulations) is the principal set of rules and regulations issued by the Departments of Transportation and Homeland Security regarding transportation and transportation related security.
Volume7, Parts 572 to 999 covers:
Chapter V – National Highway Traffic Safety Administration, Department of Transportation (continued)
Chapter VI – Federal Transit Administration, Department of Transportation
Chapter VII – National Railroad Passenger Corporation (AMTRAK)
Chapter VIII – National Transportation Safety Board