25 C.F.R. § 522.3

(a) Within 15 days after adoption, a tribe shall submit for the Chair's approval, via electronic or physical mail, any amendment to an ordinance or resolution.

(b) A tribe shall submit to the Chair all of the following information with a request for approval of an amendment:

(1) One copy of the amendment certified as authentic by an authorized tribal official;

(2) Any submission under § 522.2(b) through (g) that has been modified since its prior conveyance to the Chair for an ordinance, resolution, or amendment approval; and

(3) A conforming copy of the entire ordinance or resolution.