1990—Pub. L. 101–509 substituted “Deputy Secretary” for “Under Secretary” before “or to an Assistant Secretary”.

Amendment by Pub. L. 101–509 effective on first day of first pay period beginning on or after Nov. 5, 1990, with continued service by incumbent Under Secretary of the Interior, see section 529 [title I, § 112(e)(1), (2)(B)] of Pub. L. 101–509, set out as a note under section 3404 of Title 20, Education.

An assistant commissioner was authorized by a provision of act July 16, 1914, ch. 141, § 1, 38 Stat. 490.

For transfer of functions of other officers, employees, and agencies of Department of the Interior, with certain exceptions, to Secretary of the Interior, with power to delegate, see Reorg. Plan No. 3 of 1950, §§ 1, 2, eff. May 24, 1950, 15 F.R. 3174, 64 Stat. 1262, set out in the Appendix to Title 5, Government Organization and Employees.