Wyo. Stat. § 20-4-211: Modification of a convention child support order.

(a) 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:

(i) 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

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

(b) If a tribunal of this state does not modify a convention child support order because the order is not recognized in this state, W.S. 20-4-208(c) applies.