Federal Laws. The U. S. Constitution does not define marriage nor does it require states to define marriage. Current federal law only recognizes marriage between a man and a woman. (The law affects matters such as the receipt of federal benefits and federal taxes.) State Laws. The State Constitution currently does not define marriage. Under current California statute, only marriage between a man and a woman is valid and recognized. Couples of the same sex or unmarried couples of the opposite sex where at least one partner is 62 years or older may register as domestic partners. In most instances, registered domestic partners are provided the same rights and benefits as married couples. Rights of marriage include, but are not limited to, alimony and community property rights.