Section 13.07 - Drugs and Pet Food Additives(1) An artificial color may be used in apet food only if it has been shown to be harmless to pets. The permanent or provisional listing of an artificial color in the United States Food and Drug Regulations as safe for use together with the conditions, limitations, and tolerances, if any, shall be deemed to be satisfactory evidence that the color is, when used pursuant to such regulations, harmless to pets.(2) Prior to approval of a registration application and/or approval of a label for pet food, which contains additives, (including drugs, other special purpose additives, or non-nutritive additives) the distributor may be required to submit evidence to prove the safety and efficacy of the pet food, when used according to directions furnished on the label. Satisfactory evidence of the safety and efficacy of a pet food may be:(a) when the pet food contains such additives, the use of which conforms to the requirements of the applicable regulation in the CFR, Title 21, or which are "prior sanctioned" or "Generally Recognized as Safe" for such use.(b) When the pet food itself is a drug as defined in Title 21, U.S.C. 360(b) and is generally recognized as safe and effective for label use or is marketed subject to an application approved by the Food and Drug Administration under Title 21, U.S.C. 360(b).(3) The medicated labeling format recommended by AAFCO shall be used to assure that adequate labeling is provided.