Oregon constitution
Article VII: judicial branch
Section 1

The judicial power of the state shall be vested in one supreme court and in such other courts as may from time to time be created by law. The judges of the supreme and other courts shall be elected by the legal voters of the state or of their respective districts for a term of six years, and shall receive such compensation as may be provided by law, which compensation shall not be diminished during the term for which they are elected.