(a) A child-custody proceeding that pertains to an Indian child, as defined in the Indian Child Welfare Act, 25 U.S.C. § 1901 et seq., is not subject to this Article to the extent that it is governed by the Indian Child Welfare Act.
(b) A court of this State shall treat a tribe as if it were a state of the United States for the purpose of applying Parts 1 and 2.
(c) A child-custody determination made by a tribe under factual circumstances in substantial conformity with the jurisdictional standards of this Article must be recognized and enforced under Part 3.