The document outlines the laws regarding same-sex marriage rights on a state-by-state basis in the United States. It notes that 37 states have Defense of Marriage Acts defining marriage as between a man and a woman, while 30 states also have constitutional amendments with this definition. It then lists each state and whether they have laws or constitutional amendments banning same-sex marriage, allow civil unions or domestic partnerships, or permit same-sex marriage. A handful of states have no laws banning same-sex marriage.