(1) Adoption of regulations under the Federal Food, Drug and Cosmetic Act in this chapter is of the version effective February 9, 2017, and 21 U.S.C. 301 et seq. in this chapter is adoption of the version effective September 27, 2017.

(2) Adoption of provisions under the Association of American Feed Control Officials (AAFCO) official publication in this chapter is adoption of the provisions in the 2018 edition.

(3) If there is conflict between this chapter, chapter 15.53 RCW, adopted federal regulations, and adopted AAFCO provisions, the conflict must be resolved by giving precedence in the following order:

(a) Adopted federal regulations;

(b) Chapter 15.53 RCW;

(c) This chapter;

(d) Adopted AAFCO pet food and specialty pet food provisions; and

(e) Adopted AAFCO commercial feed provisions.

(4) If this chapter is silent with regard to any aspect of pet food or specialty pet food, then the regulations under chapter 16-250 WAC apply.