self governing

/ˌsɛlfˈɡʌvərnɪŋ/
adjective
  1. Having the power to control or rule oneself or itself; independent and not controlled by an outside authority.
    • The school became a self-governing institution, making its own decisions about the curriculum.
    • The club is a self-governing body, with members voting on all major rules.
    • Many former colonies became self-governing nations in the 20th century.