(1) Participation in this program is voluntary, except as provided in chapter 15.15 RCW, and may be withdrawn at the option of the applicant.

(2) The department will refuse or cancel certification of any seed potato planting or seed potato lot that fails to comply with this chapter.

(3) Issuance of a certified state of Washington tag, stamp or other document under this chapter means only that the tagged, stamped or otherwise documented seed potatoes have been subjected to procedures and requirements described in this chapter and determined to be in compliance with its standards and requirements. The department disclaims all express or implied warranties, including without limitation implied warranties of merchantability and fitness for particular purpose, regarding all plants, plant parts, and plant materials under this chapter. Certification is based solely on compliance with this chapter.

(4) The department is not responsible for disease, genetic disorders, off-type, failure of performance, mislabeling or otherwise, in connection with this chapter. No grower, dealer, government official, or other person is authorized to give any expressed or implied warranty, or to accept financial responsibility on behalf of the department regarding this chapter.