Treaties are agreements between two parties; in Aboriginal and Indigenous law, they most often refer to agreements between Indigenous communities and the Crown. Treaties are used to form alliances, establish relationships, and create and renew ongoing commitments. Because they formalize the relationship between Indigenous and colonizing communities and set out theoretically shared standards of behaviour and mutually beneficial relationships, they exist at an intersection between Aboriginal Law and Indigenous Law. There are both modern and historical treaties, signed between specific Indigenous communities and colonial representatives.