"In 1996 the tribal council tightened the rules, declaring for the first time that "members had to have an ancestor from the subset of Temecula who relocated to the Pechanga valley" where the reservation was established.In cases of disenrollment of large families in 2004 and 2006, Pechanga officials have said they were enforcing rules of membership that required historical residence as well as descent from known Temecula.