(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 chapter to the extent that it is governed by the Indian Child Welfare Act.
(b) A court of the state shall treat a tribe as if it were a state of the United States for the purpose of applying subchapters I and II of this chapter.
(c) A child custody determination made by a tribe under factual circumstances in substantial conformity with the jurisdictional standards of this chapter must be recognized and enforced under subchapter III of this chapter.