Hawaii Revised Statutes Division 3. Property; Family § 551G-19

(1) If the court of the State of Hawaii has jurisdiction under section 551G-13, it may proceed with the case unless a court in another state acquires jurisdiction under provisions similar to section 551G-13 before the appointment or issuance of the order; and

(2) If the court of the State of Hawaii does not have jurisdiction under section 551G-13, whether at the time the petition is filed or at any time before the appointment or issuance of the order, the court shall stay the proceeding and communicate with the court in the other state. If the court in the other state has jurisdiction, the court of the State of Hawaii shall dismiss the petition unless the court in the other state determines that the court of the State of Hawaii is a more appropriate forum.