Michigan Constitution
Article I. Declaration of Rights
§ 25. Union of one man and one woman as only agreement recognized as marriage or similar union
To secure and preserve the benefits of marriage for our society and for future generations of children, the union of one man and one woman in marriage shall be the only agreement recognized as a marriage or similar union for any purpose.
Adopted Nov. 2, 2004. Effective Dec. 18, 2004.