ORS § 261.030
Nothing contained in this chapter authorizes or empowers the board of directors of any people's utility district to interfere with or exercise any control over any existing utility owned and operated by any electric cooperative or city in the district unless by consent of the governing body of the electric cooperative or of the city council or the governing body of the plant owned by a city, when the control of the plant is vested in a governing body other than the city council or governing body of the city. However a district may participate fully, on a mutually agreed basis, with electric cooperatives and utilities owned by cities in common facilities under ORS 261.235 to 261.255 and in the formation and operation of joint operating agencies under ORS chapter 262.
ORS 261.030