Section 146.5 - Specific provisions for all participating flocks(a) Participating flocks, and all equipment used in connection with the flocks, shall be separated from non-participating flocks in a manner acceptable to the Official State Agency.(b) 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. 71 FR 56328 , Sept. 26, 2006, as amended at 79 FR 38765 , July 9, 2014