Mich. Comp. Laws § 712B.29

Sec. 29. (1) If an Indian child is taken into custody under section 14 of chapter XIIA, the subsequent placement shall terminate immediately when the removal and placement are no longer necessary to prevent imminent physical damage or harm to the child. (2) If a child is taken into custody under section 14 of chapter XIIA and the child is under the exclusive jurisdiction of an Indian tribe or is domiciled on a reservation but temporarily located off the reservation, the court shall immediately initiate a child custody proceeding and do either of the following: (a) Transfer the child to the jurisdiction of the appropriate Indian tribe. (b) Return the child to the parent or Indian custodian.