RSA 546-B:6 Simultaneous Proceedings.

I. A tribunal of this state may exercise jurisdiction to establish a support order if the petition or comparable pleading is filed after a petition or comparable pleading is filed in another state or a foreign country only if:
(a) The petition or comparable pleading in this state is filed before the expiration of the time allowed in the other state or the foreign country for filing a responsive pleading challenging the exercise of jurisdiction by the other state or the foreign country;
(b) The contesting party timely challenges the exercise of jurisdiction in the other state or foreign country; and
(c) If relevant, this state is the home state of the child.
II. A tribunal of this state may not exercise jurisdiction to establish a support order if the petition