19 U.S.C. § 2031
Authorities; delegation of functions; rules and regulations
The head of any agency performing functions authorized by this chapter may—
(1)
authorize the head of any other agency to perform any of such functions; and
(2)
prescribe such rules and regulations as may be necessary to perform such functions.
( Pub. L. 89–283, title V, § 501 , Oct. 21, 1965 , 79 Stat. 1025 .)