Mich. Admin. Code R. 325.2
Rule 2.
Bodies dead from a cause not named in R 325.1 which shall reach their destination within 48 hours from the time of death, or are addressed to the demonstrator of anatomy of a medical college or for other demonstration purposes, may be received for transportation when encased in a sound shipping case. If the body is not so addressed or cannot reach its destination within 48 hours it must be prepared for shipment as described in R 325.1. When dead bodies are shipped by common carrier, a burial-transit or disinterment permit shall be securely fastened upon the outside box, and a duplicate of such permit shall be supplied by the funeral director to the person escorting the body, or, if there is no escort, a duplicate of the permit shall be mailed to the receiving funeral director.
Mich. Admin. Code R. 325.2