Sec. 5. (a) Before a child custody determination is made under this article, notice and an opportunity to be heard in accordance with the standards of IC 31-21-3-3 must be given to the following persons:
(1) Persons entitled to notice under Indiana law as in child custody proceedings between residents of Indiana.
(2) A parent whose parental rights have not been previously terminated.
(3) Any person having physical custody of the child.
(b) This article 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 this article are governed by Indiana law in the same manner as in child custody proceedings between Indiana residents.