9 C.F.R. § 381.210
Any poultry carcass, or part thereof; or any product made wholly or in part from any poultry carcass or part thereof; or any dead, dying, disabled, or diseased poultry is subject to detention for a period not to exceed 20 days when found by any authorized representative of the Secretary upon any premises where it is held for purposes of, or during or after distribution in commerce or otherwise subject to the Act, and there is reason to believe that any such poultry or other article is adulterated or misbranded and is capable of use as human food or has not been inspected, in violation of the provisions of the Act, any other Federal law, or the laws of any State or territory, or the District of Columbia; or that it has been or is intended to be distributed in violation of the provisions of the Act, any other Federal law, or the laws of any State or territory, or the District of Columbia.
9 C.F.R. §381.210