5 U.S.C. § 3347 - U.S. Code - Unannotated Title 5. Government Organization and Employees § 3347. Exclusivity

(a)Sections 3345 and 3346 are the exclusive means for temporarily authorizing an acting official to perform the functions and duties of any office of an Executive agency (including the Executive Office of the President, and other than the Government Accountability Office) for which appointment is required to be made by the President, by and with the advice and consent of the Senate, unless--

(b) Any statutory provision providing general authority to the head of an Executive agency (including the Executive Office of the President, and other than the Government Accountability Office) to delegate duties statutorily vested in that agency head to, or to reassign duties among, officers or employees of such Executive agency, is not a statutory provision to which subsection (a)(1) applies.