Mich. Comp. Laws § 450.1621: Dissent of shareholder to amendment; payment to dissenting shareholder.

Sec. 621.

A holder of adversely affected shares who does not vote for or consent in writing to a proposed amendment may dissent, pursuant to section 762, and receive payment for the shares, if the amendment does either of the following:

Materially alters or abolishes a preferential right of the shares having preferences.

Creates, alters, or abolishes a material provision or right in respect of the redemption of the shares or a sinking fund for the redemption or purchase of the shares.

A dissenting shareholder shall not receive payment in excess of the sum payable upon redemption of the shares or liquidation of the corporation, whichever is less.