Mich. Comp. Laws § 552.36: Marriage annulment; action by party to marriage.

Sec. 36.

A party to a marriage who, at the time of the marriage, was not capable in law of contracting and who later becomes capable in law of contracting may bring an action to annul the marriage. The court shall not, however, annul the marriage if the court finds that the parties cohabited as husband and wife after the party became capable in law of contracting.