SECTION 104. APPLICATION TO INDIAN TRIBES.
(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 [Act]
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 [Articles] 1 and 2.]
[(c) A child-custody determination made by a tribe under factual
circumstances in substantial conformity with the jurisdictional standards of this
[Act] must be recognized and enforced under [Article] 3.]