The Fernandeño Tataviam people have continued to maintain their tribal government since time immemorial. During the era of the Spanish Missionaries to the Mexican government, the Tataviam were referred to as the Mission Indians of San Fernando (Fernandeños). Following the annexation of California, the United States Indian Affairs grouped the Fernandeño Tataviam and other numerous Indian villages at Fort Tejon (Sebastian) Indian Reservation. In 1892 the Indian Affairs recognized the Fernandeño Tataviam Band of Mission Indians under the Mission Indian Relief Act.
The unceasing political authority of the Tribe derives from the will of the Fernandeño Tataviam people. Today the Fernandeño Tataviam Band of Mission Indians is governed by two branches of Tribal government entrusted with the duties of defending the Tataviam Constitution and the rights of all Fernandeño Tataviam people.