1. Except for an order under section 598C.304, and except as otherwise provided in subsection 2, and consistent with the federal Servicemembers Civil Relief Act, 50 U.S.C. app. §§521 and 522 and the Iowa national guard civil relief provisions contained in chapter 29A, subchapter VI, on motion of a deploying or other parent or any nonparent to whom caretaking authority, decision-making authority, or limited contact has been granted, the court may modify or terminate the grant if the modification or termination is consistent with this article and it is in the best interest of the child. A modification is temporary and terminates pursuant to article IV after the deploying parent returns from deployment, unless the grant has been terminated before that time by court order.
2. The court may appoint a guardian ad litem or an attorney to represent the best interest of the child or may require an appropriate agency to make an investigation of the parties as provided in section 598.12.