21 CFR § 509.5 - Petitions.

---
identifier: "/us/cfr/t21/s509.5"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "21 CFR § 509.5 - Petitions."
title_number: 21
title_name: "Food and Drugs"
section_number: "509.5"
section_name: "Petitions."
chapter_name: "FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES"
subchapter_number: "E"
subchapter_name: "ANIMAL DRUGS, FEEDS, AND RELATED PRODUCTS"
part_number: "509"
part_name: "UNAVOIDABLE CONTAMINANTS IN ANIMAL FOOD AND FOOD-PACKAGING MATERIAL"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "21 U.S.C. 336, 342, 346, 346a, 348, 371."
regulatory_source: "42 FR 52821, Sept. 30, 1977, unless otherwise noted."
cfr_part: "509"
---


# 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 § 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]