Missouri Revised Statutes Title XXIII. Corporations, Associations and Partnerships § 351.105. When amendment shall become effective

1. Upon the filing of the certificate of amendment and the issuance of the certificate by the secretary of state, the amendment shall become effective and the articles of incorporation shall be deemed to be amended accordingly; provided, however, that any certificate of amendment filed by a corporation hereunder may provide that it is not to become effective until a specified date subsequent to its filing date, but such date shall not be more than ninety days after its filing date and the certificate issued by the secretary of state shall indicate such deferred effective date.

2. No amendment shall affect any existing cause of action in favor of or against such corporation, or any pending suit in which such corporation shall be a party, or the existing rights of persons other than shareholders; and, in the event the corporate name shall be changed by amendment, no suit brought by or against such corporation under its former name shall be abated for that reason.