The regulations in this part governing conduct in and on the Treasury Building and grounds and the Treasury Annex Building and grounds are promulgated pursuant to the authority vested in the Secretary of the Treasury, including (5 U.S.C. 301), and that vested in him by delegation from the Administrator of General Services, 38 FR 20650 (1973), and in accordance with the authority vested in the Director of the U.S. Secret Service by Treasury Department Order No. 177-25 (Revision 2), 38 FR 21947 (1973).