Applicable law.

(1) Except as otherwise provided by subsection (2), the law of this state shall apply in all actions and proceedings concerning the entry, enforcement, and duration of orders of income withholding entered by a court in this state, based upon a support order of another jurisdiction entered pursuant to section 6. (2) The law of the jurisdiction that issued the support order shall govern all of the following: (a) The interpretation of the support order entered under section 6, including the amount, form of payment, and duration of support. (b) The amount of support arrearages necessary to require the issuance of an order of income withholding. (c) The definition of which costs, if any, in addition to the periodic support obligation, are included as arrearages that are enforceable by income withholding, including but not limited to interest, attorney's fees, court costs, and costs of paternity testing. (3) The statute of limitations of this state for maintaining an action on support arrearages shall apply.