9 CFR § 145.5 - Specific provisions for participating flocks.
(a) Poultry equipment, and poultry houses and the land in the immediate vicinity thereof, shall be kept in sanitary condition in accordance with part 147 of this subchapter. The participating flock, its eggs, and all equipment used in connection with the flock shall be separated from nonparticipating flocks, in a manner acceptable to the Official State Agency.
(c) A flock shall be deemed to be a participating flock at any time only if it has qualified for the U.S. Pullorum-Typhoid Clean classification, as prescribed in Subparts B, C, D, E, F, G, H, or I of this part.
(d) Each bird shall be identified with a sealed and numbered band obtained through or approved by the Official State Agency: Provided, That exception may be made at the discretion of the Official State Agency.