[Code of Federal Regulations] [Title 9, Volume 2] [Revised as of January 1, 2007] From the U.S. Government Printing Office via GPO Access [CITE: 9CFR355.8] [Page 411] TITLE 9--ANIMALS AND ANIMAL PRODUCTS CHAPTER III--FOOD SAFETY AND INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE PART 355_CERTIFIED PRODUCTS FOR DOGS, CATS, AND OTHER CARNIVORA; Sec. 355.8 Official number. To each plant granted inspection an official number shall be assigned. Such number shall be preceded by the letter ``A'' and used to identify all certified products prepared in the plant.