Pub. L. 100-180, div. A, tit. I, pt. D, sec. 244
LIMITATIONS ON AIRCRAFT ENHANCEMENT AND MODERNIZATION
SEC. 244. LIMITATIONS ON AIRCRAFT ENHANCEMENT AND MODERNIZATION (a) Modernization Restricted.—Funds described in section 241 may not be used for modernization of the B-1B bomber aircraft. (b) Conditions for Enhancements.—The Secretary of Defense may not carry out an enhancement of the B-1B aircraft unless the enhancement is specifically authorized by law and funds are specifically appropriated for that purpose. If the Secretary submits a request for any such authorization and funds, the Secretary shall include with the request— (1) a description of the requested aircraft enhancement; (2) full justification for the enhancement; (3) the total program costs of the enhancement; and (4) the planned schedule for incorporating the enhancement into the aircraft.