21 CFR § 510.210 - Revocation of an import tolerance.

---
identifier: "/us/cfr/t21/s510.210"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "21 CFR § 510.210 - Revocation of an import tolerance."
title_number: 21
title_name: "Food and Drugs"
section_number: "510.210"
section_name: "Revocation of an import tolerance."
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: "510"
part_name: "NEW ANIMAL DRUGS"
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. 321, 331, 351, 352, 353, 360b, 371, 379e."
regulatory_source: "40 FR 13807, Mar. 27, 1975, unless otherwise noted."
cfr_part: "510"
---


# 510.210 Revocation of an import tolerance.

(a) The Commissioner, on his or her own initiative or on the petition of an interested person, under § 10.25 of this chapter, may revoke an import tolerance if:

(1) Scientific evidence shows an import tolerance to be unsafe; or

(2) Information demonstrates that the use of a new animal drug under actual use conditions results in food being imported into the United States with residues exceeding the import tolerance.

(b) The Commissioner will provide public notification under § 510.207(b) that will specify the basis for the decision and will be effective at the time the information is made available to the public.

(c) A petition for revocation must be submitted in the form specified in § 10.30 of this chapter.