49 CFR § 26.3 - To whom does this part apply?
(a) If you are a recipient of any of the following types of funds, this part applies to you:
(1) Federal-aid highway funds authorized under Titles I (other than Part B) and V of the Intermodal Surface Transportation Efficiency Act of 1991 (ISTEA), Public Law 102-240, 105 Stat. 1914, or Titles I, III, and V of the Transportation Equity Act for the 21st Century (TEA-21), Public Law 105-178, 112 Stat. 107. Titles I, III, and V of the Safe, Accountable, Flexible, Efficient Transportation Equity Act: A Legacy for Users (SAFETEA-LU), Public Law 109-59, 119 Stat. 1144; Divisions A and B of the Moving Ahead for Progress in the 21st Century Act (MAP-21), Pub. L. 112-141, 126 Stat. 405; Titles I, II, III, and VI of the Fixing America's Surface Transportation Act (FAST Act) Public Law 114-94;, and Divisions A and C of the Bipartisan Infrastructure Law (BIL), enacted as the Infrastructure Investment and Jobs Act (IIJA), Public Law 117-58.
(2) Federal transit funds authorized by Titles I, III, V and VI of ISTEA, Public Law 102-240 or by Federal transit laws in Title 49, U.S. Code, or Titles I, III, and V of the TEA-21, Public Law 105-178. Titles I, III, and V of the Safe, Accountable, Flexible, Efficient Transportation Equity Act: A Legacy for Users (SAFETEA-LU), Public Law 109-59, 119 Stat. 1144; Divisions A and B of the Moving Ahead for Progress in the 21st Century Act (MAP-21), Public Law 112-141, 126 Stat. 405; Titles I, II, III, and VI of the Fixing America's Surface Transportation Act (FAST Act) Public Law 114-94; and Divisions A and C of the Bipartisan Infrastructure Law (BIL), enacted as the Infrastructure Investment and Jobs Act (IIJA) (Pub. L. 117-58), Public Law 117-58.
(3) Airport funds authorized by 49 U.S.C. 47101, et seq.
(b) [Reserved]
(c) If you are letting a contract, and that contract is to be performed entirely outside the United States, its territories and possessions, Puerto Rico, Guam, or the Northern Mariana Islands, this part does not apply to the contract.
(d) If you are letting a contract in which DOT financial assistance does not participate, this part does not apply to the contract.