45 C.F.R. § 400.118
(b) Case planning for unaccompanied minors must, at a minimum, address the following elements:
(c) A State, or its designee under section 400.117 of this part, must review the continuing appropriateness of each unaccompanied minor's living arrangement and services no less frequently than every 6 months.
(Approved by the Office of Management and Budget under control number 0960-0418)