Michigan Compiled Laws, Chapter 600. Revised Judicature Act of 1961 § 600.1329

Sec. 1329. (1) The legality or regularity of the selection of jurors shall not be questioned if the record of the selection is properly signed. If the name of any person not qualified to serve as a juror is included in the names selected, this fact shall not be a ground of challenge to the array, but only a ground of personal challenge to the person shown to be so disqualified.

(2) If the jurors were selected in accordance with this act and the rules of the court, it is not a ground of challenge to a panel or array of jurors that the person who selected them was a party or interested in the cause or was counsel or attorney for, or related to, either party in the cause.

(3) If the jurors were selected in accordance with this act and the rules of the court, it is not a ground of challenge to a panel or array of jurors that they were summoned by the sheriff who was a party or interested in the cause, or related to either party in the cause, unless it is alleged in the challenge and satisfactorily shown that some of the jurors selected were not summoned and that this omission was intentional.