9 C.F.R. § 590.150 Official plant numbers.
Title 9 - Animals and Animal Products
An official plant number shall be assigned to each plant granted inspection service. Such plant number shall be used to identify all containers of inspected products prepared in the plant which are capable of use as human food. A plant shall not have more than one plant number.
Title 9: Animals and Animal Products
PART 590—INSPECTION OF EGGS AND EGG PRODUCTS (EGG PRODUCTS INSPECTION ACT)
Inauguration of Service
§ 590.150 Official plant numbers.