The definitions in this section shall apply throughout this chapter.

(1) "Department" means the department of agriculture of the state of Washington.

(2) "Director" means the director of the department of agriculture or a duly appointed representative.

(3) "Potato" means plants or plant parts of Solanum tuberosum.

(4) "Seed potatoes" means vegetatively propagated tubers of Solanum tuberosum used for propagation or production.

(5) "Seed potato certification program" means the program in which certified seed potatoes are produced, as set forth in chapter 16-324 WAC.