[Code of Federal Regulations] [Title 21, Volume 6] [Revised as of April 1, 2004] From the U.S. Government Printing Office via GPO Access [CITE: 21CFR530.21] [Page 336] TITLE 21--FOOD AND DRUGS CHAPTER I--FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) PART 530_EXTRALABEL DRUG USE IN ANIMALS--Table of Contents Subpart C_Specific Provisions Relating to Extralabel Use of Animal and Human Drugs in Food-Producing Animals Sec. 530.21 Prohibitions for food-producing animals. (a) FDA may prohibit the extralabel use of an approved new animal or human drug or class of drugs in food-producing animals if FDA determines that: (1) An acceptable analytical method needs to be established and such method has not been established or cannot be established; or (2) The extralabel use of the drug or class of drugs presents a risk to the public health. (b) A prohibition may be a general ban on the extralabel use of the drug or class of drugs or may be limited to a specific species, indication, dosage form, route of administration, or combination of factors.