Michigan Compiled Laws, Chapter 333. Health § 333.7505

Sec. 7505. (1) The warrant shall:

(2) A warrant issued pursuant to this section shall be executed and returned within 10 days after its date unless, upon a showing of a need for additional time, the court orders otherwise. If property is seized pursuant to a warrant, a copy shall be given to the person from whom or from whose premises the property is taken, together with a receipt for the property taken. The return of the warrant shall be made promptly, accompanied by a written inventory of any property taken. The inventory shall be made in the presence of the person executing the warrant and of the person from whose possession or premises the property was taken, if present, or in the presence of at least 1 credible person other than the person executing the warrant. A copy of the inventory shall be delivered to the person from whom or from whose premises the property was taken and to the applicant for the warrant.

(3) The magistrate who issues a warrant shall attach thereto a copy of the return and all papers returnable in connection therewith and file them with the clerk of the magistrate's court in which the inspection was made.