Our Constitution was completed on December 13, 1959. On January 4, 1960 Assistant Secretary of the Department of the Interior Roger Ernst, based on the recommendation of Commissioner Glenn L. Emmons formally acknowledged our tribal government. Amendment(s) were later approved and acknowledged on January 17, 1961 by Assistant Secretary of the Department of the Interior George W. Abbott.
Kilyinakiktum Mission Creek ,Kauwisikiktum The clan of Captain Jim and his son Will Jim Coachella informants This clan lives North West of Palm Springs, Mission Creek from which place the Coachella branch is said to have been derived several generations ago. Kauwis is said to be the place name Mission Creek, Dr Kroeber gives Kawishmu in Serrano language as a small hill east of White Water marking the boundary between the Wanupiapayum and the desert Cahuilla.
Atiaviat. A coyote clan living at Mission Creek (Yamisevul).Atiaviat is said to mean "something big." Miguel Sabatco belongs to the Atiaviat clan. The Atiaviat never married the Morongo, but married Mohiyanim and Mukunpat. The Morongo formerly visited Mission Creek for certain kind of seeds.
Congress expressly recognized the bands of Mission Indians in Southern California, including Mission Creek, by their "Act for the Relief of the Mission Indians in California" on January 21, 1891 and later Indian Appropriations Act of March 1, 1907.