Wash. Admin. Code § 16-256-030
The label, tag, or label invoice accompanying shipments of animal waste products must contain the information required in RCW 15.53.9016, this chapter and the following information:
(1) If the product contains drugs or drug residues, then the label must contain the following statement in boldface type at least one-half as large as the largest type appearing on the label:
"warning: this product contains drug residues. do not use within thirty days of slaughter and do not use thirty days prior to or during the food production period of dairy animals and/or hens."
(2) If the product contains high levels (15 ppm or greater) of copper, then the label must contain the following statement in boldface type at least one-half as large as the largest type appearing on the label:
"warning: contains high levels of copper: do not feed to sheep."
(3) If the product derives one-third or more of the guaranteed total crude protein from nonprotein nitrogen sources, the label shall provide adequate directions for safe use of the product and the precautionary statement:
"caution: use only as directed."
(4) Animal waste product labels, tags, or labeling must contain the following guarantees in percentages by weight in the following order and form:
(6) Mixed feeds containing processed animal waste products must:
[Statutory Authority: Chapters 15.53 and 34.05 RCW. WSR 03-23-131, § 16-256-030, filed 11/19/03, effective 7/1/04.]