25 U.S. Code § 123 - Expenditure from tribal funds without specific appropriations
No money shall be expended from Indian tribal funds without specific appropriation by Congress except as follows: Equalization of allotments, education of Indian children in accordance with existing law, per capita and other payments, all of which are hereby continued in full force and effect: Provided, That this shall not change existing law with reference to the Five Civilized Tribes.
Source(May 18, 1916, ch. 125, § 27,39 Stat. 158.)