Sec. 4. (a) An Indiana tribunal may exercise jurisdiction to establish a support order if the petition or comparable pleading is filed after a pleading is filed in another state or a foreign country only if:
(1) the petition or comparable pleading in Indiana 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;
(2) the contesting party timely challenges the exercise of jurisdiction in the other state or the foreign country; and
(3) if relevant, Indiana is the home state of the child.
(b) An Indiana tribunal may not exercise jurisdiction to establish a support order if the petition or comparable pleading is filed before a petition or comparable pleading is filed in another state or a foreign country if:
(1) the petition or comparable pleading in the other state or foreign country is filed before the expiration of the time allowed in Indiana for filing a responsive pleading challenging the exercise of jurisdiction by Indiana;
(2) the contesting party timely challenges the exercise of jurisdiction in Indiana; and
(3) if relevant, the other state or foreign country is the home state of the child.