Oregon Revised Statutes Education and Culture § 358.320

(1) The governing body of a city may appoint a museum commission, which shall consist of seven members chosen with reference to their fitness for the position.

(2) The members of a city museum commission shall be residents of the city in which the museum is or is to be located. When two or more cities jointly establish, maintain and operate a public museum, four of the members of a joint city museum commission shall be residents of the city in which the museum is or is to be located and three of the members shall be residents of the other city or cities.