Mich. Comp. Laws § 500.5234

Sec. 5234. A majority of the shares entitled to vote on a particular subject matter at any meeting of the stockholders shall constitute a quorum for such vote unless otherwise provided by law or in the articles or in any bylaw adopted by the stockholders. A minimum of 10 members present in person shall constitute a quorum at any meeting of those insurers having members only and no stockholders, unless a larger number is specified in the articles or in any bylaw adopted by the members.