Beginning in fiscal year 1998 and thereafter, such sums as may be necessary for expenses for the provision of Customs services at certain small airports or other facilities when authorized by law and designated by the Secretary of the Treasury, including expenditures for the salary and expenses of individuals employed to provide such services, to be derived from fees collected by the Secretary pursuant to section 58b of this title for each of these airports or other facilities when authorized by law and designated by the Secretary, and to remain available until expended.
19 U.S. Code § 58b–1 - Expenses from fees collected
For transfer of functions, personnel, assets, and liabilities of the United States Customs Service of the Department of the Treasury, including functions of the Secretary of the Treasury relating thereto, to the Secretary of Homeland Security, and for treatment of related references, see sections 203(1), 551(d), 552(d), and 557 of Title 6, Domestic Security, and the Department of Homeland Security Reorganization Plan of November 25, 2002, as modified, set out as a note under section 542 of Title 6. For establishment of U.S. Customs and Border Protection in the Department of Homeland Security, treated as if included in Pub. L. 107–296 as of Nov. 25, 2002, see section 211 of Title 6, as amended generally by Pub. L. 114–125, and section 802(b) of Pub. L. 114–125, set out as a note under section 211 of Title 6.