1957—Puspan. L. 85–89 substituted “Teachers in schools operated by the Bureau of Indian Affairs” for “Teachers of the Indian schools and physicians of the Indian Service”.

1928—Act May 8, 1928, made section applicable to physicians of the Indian Service.

1922—Act Aug. 24, 1922, increased educational leave allowance from 15 to 30 days.

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.