Mich. Comp. Laws § 600.1326: Grand jurors; selection; term.

Sec. 1326.

If a grand jury is ordered by the court, or required by statute, the board shall select the names of a sufficient number of persons, as determined by the chief circuit judge, to serve as grand jurors in accordance with the provisions of section 11 of chapter VII of the code of criminal procedure, 1927 PA 175, MCL 767.11. The names shall be selected in the same manner and from the same source as petit jurors. The term of service of grand jurors shall be as prescribed by section 7a of chapter VII of the code of criminal procedure, 1927 PA 175, MCL 767.7a.