Section 63-17-1920 - Applicability of state law; foreign law(A) The law of this State shall apply in all actions and proceedings concerning the issuance, enforcement, and duration of orders to withhold issued by a court of this State, which is based upon a support order of another jurisdiction entered pursuant to Section 63-17-1830, except as provided in subsections (B) and (C) of this section.(B) The law of the jurisdiction which issued the support order shall govern the following: (1) the interpretation of the support order entered under Section 63-17-1840, including amount, form of payment, and the duration of support;(2) the amount of support arrearages necessary to require the issuance of an order to withhold;(3) the definition of what costs, in addition to the periodic support obligation, are included as arrearages which are enforceable by income withholding, including but not limited to interest, attorney's fees, court costs, and costs of paternity testing.(C) The court in this State may impose its costs as allowed by law.2008 Act No. 361, Section 2.