Pub. L. 109-90, tit. V, sec. 531

Sec. 531. Except as provided in section 44945 of title 49, United States Code, funds appropriated or transferred to Transportation Security Administration “Aviation Security” and “Administration” in fiscal years 2004 and 2005 that are recovered or deobligated shall be available only for procurement and installation of explosive detection systems for air cargo, baggage, and checkpoint screening systems: Provided, That these funds shall be subject to section 503 of this Act.