[Code of Federal Regulations] [Title 21, Volume 6] [Revised as of January 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 21CFR509.5] [Page 34] TITLE 21--FOOD AND DRUGS CHAPTER I--FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) PART 509--UNAVOIDABLE CONTAMINANTS IN ANIMAL FOOD AND FOOD-PACKAGING MATERIAL--Table of Contents Subpart A--General Provisions Sec. 509.5 Petitions. The Commissioner of Food and Drugs, either on his own initiative or on behalf of any interested person who has submitted a petition, may issue a proposal to establish, revoke, or amend a regulation under this part. Any such petition shall include an adequate factual basis to support the petition, shall be in the form set forth in Sec. 10.30 of this chapter, and will be published in the Federal Register for comment if it contains reasonable grounds for the proposed regulation. [42 FR 52821, Sept. 30, 1977, as amended at 54 FR 18280, Apr. 28, 1989]