(a) Except as otherwise provided by Section 159.711, if a foreign country lacks or refuses to exercise jurisdiction to modify its child support order pursuant to its laws, a tribunal of this state may assume jurisdiction to modify the child support order and bind all individuals subject to the personal jurisdiction of the tribunal regardless of whether the consent to modification of a child support order otherwise required of the individual under Section 159.611 has been given or whether the individual seeking modification is a resident of this state or of the foreign country.
(b) An order issued by a tribunal of this state modifying a foreign child support order under this section is the controlling order.