Montana Title 40. Family Law § 40-7-202. Exclusive, continuing jurisdiction

(1) Except as otherwise provided in 40-7-204, a court of this state that has made a child custody determination consistent with 40-7-201 or 40-7-203 has exclusive, continuing jurisdiction over the determination until:

(2) A court of this state that has exclusive, continuing jurisdiction under this section may decline to exercise jurisdiction if the court determines that it is an inconvenient forum under 40-7-108.

(3) A court of this state that has made a child custody determination and does not have exclusive, continuing jurisdiction under this section may modify that determination only if it has jurisdiction to make an initial determination under 40-7-201.