25 U.S. Code § 715g - Tribal constitution
Upon the completion of the tribal membership roll and upon the written request of the Interim Council, the Secretary shall conduct, by secret ballot, an election for the purpose of adopting a constitution for the Tribe. Absentee balloting shall be permitted regardless of voter residence. In every other regard, the election shall be held according to section 476 of this title.
Not later than one hundred and twenty days after the Tribe adopts a constitution and bylaws, the Secretary shall conduct an election by secret ballot for the purpose of electing tribal officials as provided in the tribal constitution. Said election shall be conducted according to the procedures stated in paragraph  (a) of this section except to the extent that said procedures conflict with the tribal constitution.
 So in original. Probably should be “subsection”.