Montana Code Annotated · § 40-5-1083 — Modification of convention child support order

(1) A tribunal of this state may not modify a convention child support order if the obligee remains a resident of the foreign country where the support order was issued unless:

(a) the obligee submits to the jurisdiction of a tribunal of this state, either expressly or by defending on the merits of the case without objecting to the jurisdiction at the first available opportunity; or

(b) the foreign tribunal lacks or refuses to exercise jurisdiction to modify its support order or issue a new support order.

(2) If a tribunal of this state does not modify a convention child support order because the order is not recognized in this state, 40-5-1080(3) applies.