(1) A county service district organized under ORS chapter 451.
(2) A diking district organized under ORS chapter 551.
(3) A corporation for irrigation, drainage, water supply or flood control organized under ORS chapter 554.
(4) A soil and water conservation district organized under ORS 568.210 to 568.808 and 568.900 to 568.933.
(5) The Port of Portland created by ORS 778.010. [1971 c.403 §1; 1975 c.782 §48a; 1977 c.756 §2; 1981 c.226 §19; 1983 c.740 §53; 2007 c.562 §20]