Notice; opportunity to be heard; joinder.

(a) Before a child-custody determination is made under the Uniform Child-Custody Jurisdiction and Enforcement Act, notice and an opportunity to be heard in accordance with the standards of Section 108 must be given to all persons entitled to notice under the law of this state as in child-custody proceedings between residents of this state, any parent whose parental rights have not been previously terminated and any person having physical custody of the child. (b) The Uniform Child-Custody Jurisdiction and Enforcement Act does not govern the enforceability of a child-custody determination made without notice or an opportunity to be heard. (c) The obligation to join a party and the right to intervene as a party in a child- custody proceeding under the Uniform Child-Custody Jurisdiction and Enforcement Act are governed by the law of this state as in child-custody proceedings between residents of this state.