721 for a color additive, or a GRAS ingredient notification under subpart E of part 570 of subchapter E of chapter I of title 21, Code of Federal Regulations (or successor regulations). (b) Preemption No State or a political subdivision of a State may directly or indirectly establish, maintain, implement, or enforce any authority or requirement relating to the marketing or labeling of pet food. (c) GRAS ingredients (1) Ingredients deemed GRAS Ingredients that are intended for use in pet food, and are not specifically authorized for such use by the Food and Drug Administration as a food additive, a color additive, or otherwise as of the date of enactment of the PURR Act of 2024 , are deemed to be GRAS if— (A) such ingredients are identified as acceptable for use in pet food in chapter 6 of the 2024 edition of the AAFCO Official Publication (or any subsequent amendments thereto or editions thereof)