State laws also vary with regard to whether a court has the power to issue an enforceable temporary custody order without notice and hearing in a case without any interstate element. Such temporary orders may be enforceable, as against due process objections, for a short period of time if issued as a protective order or a temporary restraining order to protect a child from harm. Whether such orders are enforceable locally is beyond the scope of this Act. Subsection (b) [Me. cite subsection 2] clearly provides that the validity of such orders and the enforceability of such orders is governed by the law which authorizes them and not by this Act. An order is entitled to interstate enforcement and nonmodification under this Act only if there has been notice and an opportunity to be heard. The PKPA, § 1738A(e), also requires that a custody determination is entitled to full faith and credit only if there has been notice and an opportunity to be heard.

Rules requiring joinder of people with an interest in the custody of and visitation with a child also vary widely throughout the country. The UCCJA has a separate section on joinder of parties which has been eliminated. The issue of who is entitled to intervene and who must be joined in a custody proceeding is to be determined by local state law.

A sentence of the UCCJA § 4 which indicated that persons outside the State were to be given notice and an opportunity to be heard in accordance with the provision of that Act has been eliminated as redundant.

§1750.__Simultaneous proceedings

1.__Pending proceeding in another state.__Except as otherwise provided in section 1748, a court of this State may not exercise its jurisdiction under this subchapter if, at the time of the commencement of the proceeding, a proceeding concerning the custody of the child has been commenced in a court of another state having jurisdiction substantially in conformity with this chapter, unless the proceeding has been terminated or is stayed by the court of the other State because a court of this State is a more convenient forum under section 1751.

2.__Examination of documents; communication with court.__ Except as otherwise provided in section 1748, a court of this State, before hearing a child custody proceeding, shall examine the court documents and other information supplied by the parties pursuant to section 1753.__If the court determines that a child custody proceeding has been commenced in a court in another state