Indiana Code Title 31. Family Law and Juvenile Law § 31-18.5-2-5

Sec. 5. (a) An Indiana tribunal that has issued a child support order consistent with Indiana law has and shall exercise continuing, exclusive jurisdiction to modify its child support order if the order is the controlling order and:

(b) An Indiana tribunal that has issued a child support order consistent with Indiana law may not exercise continuing, exclusive jurisdiction to modify the order if:

(c) If a tribunal of another state has issued a child support order pursuant to the Uniform Interstate Family Support Act or a law substantially similar to that act which modifies a child support order of an Indiana tribunal, Indiana tribunals shall recognize the continuing, exclusive jurisdiction of the tribunal of the other state.

(d) An Indiana tribunal that lacks continuing, exclusive jurisdiction to modify a child support order may serve as an initiating tribunal to request a tribunal of another state to modify a support order issued in that state.

(e) A temporary support order issued ex parte or pending resolution of a jurisdictional conflict does not create continuing, exclusive jurisdiction in the issuing tribunal.