Michigan Compiled Laws, Chapter 722. Children § 722.26

Sec. 6.(1) This act is equitable in nature and shall be liberally construed and applied to establish promptly the rights of the child and the rights and duties of the parties involved. This act applies to all circuit court child custody disputes and actions, whether original or incidental to other actions.Those disputes and actions shall have precedence for hearing and assignment for trial over other civil actions.

(2) Except as otherwise provided in section 6b or 6e,  1 if the circuit court of this state does not have prior continuing jurisdiction over a child, the action shall be submitted to the circuit court of the county where the child resides or may be found by complaint or complaint and motion for order to show cause. An application for a writ of habeas corpus or for a warrant in its place to obtain custody of a child shall not be granted unless it appears that this act is inadequate and ineffective to resolve the particular child custody dispute.