Although twelve federally recognized Indian tribes are currently known to allow same-sex marriage, comprehensive information on the content of each of these laws and the processes by which they came to be adopted is not available from any single source. This lack of information is due in part to the fact that tribal same-sex marriage laws as we know them today are a relatively new phenomenon. Indeed, seven of the laws were adopted, or began to be interpreted to allow same-sex marriage, in 2013, 2014, or 2015—those of the Pokagon, Little Traverse, Colville, Leech Lake, Puyallup, Central Council of the Tlingit and Haida Indian Tribes, and the Eastern Shoshone and Northern Arapaho. Moreover, some tribal laws that allow same-sex marriage, such...