D.C. Code § 46-403: Marriages void from date of decree; age of consent.

The following marriages in said District shall be illegal, and shall be void from the time when their nullity shall be declared by decree, namely:

(1)

The marriage of a person adjudged to be, or to have been at the time a marriage was performed, unable by reason of mental incapacity to give valid consent to marriage;

(2)

Any marriage the consent to which of either party has been procured by force or fraud;

(3)

Repealed.

(4)

When either of the parties is under the age of consent, which is hereby declared to be 18 years of age.