1966—Pub. L. 89–554 struck out provisions which authorized employment of retired personnel of the Department of the Interior as consultants.

1944—Act Dec. 23, 1944, inserted third proviso.

1940—Act Apr. 22, 1940, provided for employment of appraisers and increased the number to be employed from five to ten.

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 under section 1451 of this title.