7 USC § 2141 - Marking and identification of animals

---
identifier: "/us/usc/t7/s2141"
source: "usc"
legal_status: "official_prima_facie"
title: "7 USC § 2141 - Marking and identification of animals"
title_number: 7
title_name: "AGRICULTURE"
section_number: "2141"
section_name: "Marking and identification of animals"
chapter_number: 54
chapter_name: "TRANSPORTATION, SALE, AND HANDLING OF CERTAIN ANIMALS"
positive_law: false
currency: "119-84"
last_updated: "2026-04-17"
format_version: "1.1.0"
generator: "[email protected]"
source_credit: "(Pub. L. 89–544, § 11, Aug. 24, 1966, 80 Stat. 351; Pub. L. 91–579, § 12, Dec. 24, 1970, 84 Stat. 1562; Pub. L. 94–279, § 5, Apr. 22, 1976, 90 Stat. 418.)"
---


# § 2141. Marking and identification of animals

*Provided*

All animals delivered for transportation, transported, purchased, or sold, in commerce, by a dealer or exhibitor shall be marked or identified at such time and in such humane manner as the Secretary may prescribe: , That only live dogs and cats need be so marked or identified by a research facility.

---

**Source Credit**: (Pub. L. 89–544, § 11, Aug. 24, 1966, 80 Stat. 351; Pub. L. 91–579, § 12, Dec. 24, 1970, 84 Stat. 1562; Pub. L. 94–279, § 5, Apr. 22, 1976, 90 Stat. 418.)

## Editorial Notes

### Amendments

1976— substituted “in commerce” for “affecting commerce”.

1970— applied marking and identification requirements to dealers and exhibitors for animals, as defined, instead of only to dogs and cats when movements are affecting commerce, but limited such requirements for research facilities to only live dogs and cats.

## Statutory Notes and Related Subsidiaries

### Effective Date of 1970 Amendment

Amendment by  effective one year after , see , set out as a note under .