(1) Persons owning or controlling public or private lands in Adams, Asotin, Benton, Chelan, Columbia, Douglas, Ferry, Franklin, Garfield, Grant, Kittitas, Klickitat, Lincoln, Okanogan, Pend Oreille, Spokane, Stevens, Walla Walla, Whitman, or Yakima counties are required to destroy all rust-susceptible barberry bushes and to keep the land free from such plants.

(2) No person who is or should be licensed as a nursery dealer under provisions of chapter 15.13 RCW may sell, offer for sale, ship or grow any rust susceptible variety of barberry or related Berberis, Mahonia, and Mahoberberis species, as defined in 7 C.F.R. 301.38-2.