RSA 546-B:7 Continuing, Exclusive Jurisdiction To Modify Child Support Order.

I. A tribunal of this state that has issued a support order consistent with the law of this state has and shall exercise continuing, exclusive jurisdiction to modify its child support order if the order is the controlling order and:
(a) At the time of the filing of a request for modification this state is the residence of the obligor, the individual obligee, or the child for whose benefit the support order is issued; or
(b) Even if this state is not the residence of the obligor, the individual obligee, or the child for whose benefit the support order is issued, the parties consent in a record or in open court that the tribunal of this state may continue to exercise jurisdiction to modify its order.
II. A tribunal of this state that has issued a child support order