21 U.S.C. § 1181
Contract authority
The authority of the Secretary to enter into contracts under this subchapter and subchapter V shall be effective for any fiscal year only to such extent or in such amounts as are provided in advance by appropriation Acts.
( Pub. L. 92–255, title IV, § 414 , as added Pub. L. 96–181, § 9(a) , Jan. 2, 1980 , 93 Stat. 1314 .)