25 U.S.C. § 2211
Governing body of tribe; construction of chapter as not vesting with authority not authorized by tribal constitution or by-laws
Nothing in this chapter shall be construed as vesting the governing body of an Indian tribe with any authority which is not authorized by the constitution and by-laws or other organizational document of such tribe.
( Pub. L. 97–459, title II, § 212 , as added Pub. L. 98–608, § 1(5) , Oct. 30, 1984 , 98 Stat. 3173 .)