21 U.S.C. § 157 : US Code - Section 157: Inspection

Search 21 U.S.C. § 157 : US Code - Section 157: Inspection

Any officer, agent, or employee of the Department of Agriculture
duly authorized by the Secretary of Agriculture for the purpose
may, at any hour during the daytime or nighttime, enter and inspect
any establishment where any virus, serum, toxin, or analogous
product for use in the treatment of domestic animals is prepared
for sale, barter, exchange, or shipment as aforesaid.