Cleo Pablo is a citizen of the Ak-Chin Tribal Community. She lives on the Ak-Chin Indian Reservation, located within the geographical boundaries of Maricopa County within the state of Arizona. Under the Ak-Chin Constitution, she qualifies for enrollment in the Ak-Chin Tribe—in other words, she is eligible for tribal citizenship and has all the rights and privileges that go along with it. Among those benefits are tribally funded housing, food stipends, household services, educational scholarships, and perhaps health care. Cleo Pablo is a lesbian. She has a partner, Tara Roy, a non-Indian. Like all other couples, they wish to live together and have their relationship confirmed under the laws of the sovereign under which they live—in this case, the Ak-Chin Indian Community. However, Ak-Chin law mandates that marriage exist only between a man and a woman. Furthermore, Ak-Chin law requires that couples living together in tribal housing on the reservation be married. Accordingly, Ms. Pablo and Ms.