5 U.S.C. § 8145
Administration
The Secretary of Labor shall administer, and decide all questions arising under, this subchapter. He may—
(1)
appoint employees to administer this subchapter; and
(2)
delegate to any employee of the Department of Labor any of the powers conferred on him by this subchapter.
( Pub. L. 89–554 , Sept. 6, 1966 , 80 Stat. 553 .)