(a) Nothing in this part may be construed to allow the Administrator to modify or waive any requirement under—

(1) 49 U.S.C. 5333;

(2) The National Environmental Policy Act of 1969 (42 U.S.C. 4321, et seq.); or

(3) Any other provision of Federal statute.

(b) The Administrator's approval of an application under this part does not commit Federal-aid funding for the project.