43 U.S.C. § 32

Acting Director

The Secretary of the Interior may authorize one of the geologists to act as Director of the United States Geological Survey in the absence of that officer.

( July 31, 1894, ch. 174, § 1 , 28 Stat. 197 ; Pub. L. 102–154, title I , Nov. 13, 1991 , 105 Stat. 1000 .)