9 CFR § 145.72 - Participation.

---
identifier: "/us/cfr/t9/s145.72"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "9 CFR § 145.72 - Participation."
title_number: 9
title_name: "Animals and Animal Products"
section_number: "145.72"
section_name: "Participation."
chapter_name: "ANIMAL AND PLANT HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE"
subchapter_number: "G"
subchapter_name: "LIVESTOCK IMPROVEMENT"
part_number: "145"
part_name: "NATIONAL POULTRY IMPROVEMENT PLAN FOR BREEDING POULTRY"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "7 U.S.C. 8301-8317; 7 CFR 2.22, 2.80, and 371.4."
regulatory_source: "36 FR 23112, Dec. 3, 1971, unless otherwise noted. Redesignated at 44 FR 61586, Oct. 26, 1979."
cfr_part: "145"
---


# 145.72 Participation.

Participating flocks of primary egg-type chickens, and the eggs and chicks produced from them, shall comply with the applicable general provisions of subpart A of this part and the special provisions of this subpart G.

(a) Started chickens shall lose their identity under Plan terminology when not maintained by Plan participants under the conditions prescribed in § 145.5(a).

(b) Hatching eggs produced by primary breeding flocks should be nest clean. They may be fumigated in accordance with part 147 of this subchapter or otherwise sanitized.

(c) Any nutritive material provided to chicks must be free of the avian pathogens that are officially represented in the Plan disease classifications listed in § 145.10.

[72 FR 1420, Jan. 12, 2007, as amended at 79 FR 38759, July 9, 2014]