(2) For the purpose of this section and ORS 526.255, the following forest management regions are established:
(a) Northwest Region, consisting of Clatsop, Columbia, Tillamook, Washington and Yamhill Counties.
(b) Willamette Region, consisting of Multnomah, Clackamas, Marion, Polk, Lincoln, Benton, Linn and Lane Counties.
(c) Southern Region, consisting of Douglas, Coos, Curry, Josephine and Jackson Counties.
(d) Eastern Region, consisting of Hood River, Wasco, Gilliam, Sherman, Morrow, Umatilla, Union, Wallowa, Jefferson, Wheeler, Grant, Baker, Deschutes, Crook, Klamath, Lake, Harney and Malheur Counties. [1983 c.759 §16]