(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 1 of the following applies:

    (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.

    (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, section 708(3) applies.