Regulated articles, as listed in WAC 16-487-023, other than symptomless carriers listed in WAC 16-487-040, may be permitted entry into the state if the plant protection organization of the state in which the planting stock was grown issues a certificate verifying that all four of the following requirements have been met:

(1) Each species and variety is properly labeled as to scientific name and state of origin.

(2) One of the following two conditions has been fulfilled:

(a) The planting stock was produced in accordance with an official certification program of the state in which the planting stock was grown. The official certification program must include inspection and indexing on suitable indicator plants for peach yellows, little peach and red suture diseases; or

(b) The planting stock was tested and found free of the causal phytoplasma using a laboratory test protocol approved by the department. In order to ensure accurate test results, samples for testing must be collected late in the growing season.

(3) Peach yellows, little peach, and red suture disease symptoms were not found on the growing grounds during the period when the planting stock was growing or budwood taken .

(4) No symptomless carriers existed on the growing grounds during the production of the planting stock, except symptomless carrier planting stock that meets the requirements of subsection (2) of this section.