Louisiana Constitution of 1974 Art. XII, § 15. Defense of Marriage

Section 15. Marriage in the state of Louisiana shall consist only of the union of one man and one woman. No official or court of the state of Louisiana shall construe this constitution or any state law to require that marriage or the legal incidents thereof be conferred upon any member of a union other than the union of one man and one woman. A legal status identical or substantially similar to that of marriage for unmarried individuals shall not be valid or recognized. No official or court of the state of Louisiana shall recognize any marriage contracted in any other jurisdiction which is not the union of one man and one woman.