Michigan Compiled Laws, Chapter 450. Corporations § 450.2631

Sec. 631.  (1) If an amendment to the articles of incorporation is approved under section 611(1)(a),  1 a majority of the incorporators shall sign and file a certificate of amendment on behalf of the corporation that sets forth the amendment and certifies that the amendment was adopted by unanimous consent of the incorporators before the first meeting of the board.

(2) If an amendment to the articles of incorporation is approved under section 611(1)(a) or section 611(2), an officer of the corporation shall execute and file a certificate of amendment on behalf of the corporation that sets forth the amendment and certifies that it was adopted by the board of directors.

(3) Except for an amendment to the articles of incorporation described in subsection (1) or (2) or as otherwise provided in this act, if an amendment is approved, an officer of the corporation shall execute and file a certificate of amendment on behalf of the corporation that sets forth the amendment and certifies that the amendment was adopted in the manner required under section 611(3).

(4) If a corporation amends an article in its articles of incorporation that is divided into separately identified sections, the certificate of amendment may only set forth the section of the article that was amended.  Otherwise, the certificate of amendment must set forth the entire article that was amended.