Group/lot identification number (GIN).
Group/lot identification number (GIN). The identification number used to uniquely identify a unit of animals of the same species that is managed together as one group throughout the preharvest production chain. When a GIN is used, it is recorded on documents accompanying the animals moving interstate; it is not necessary to have the GIN attached to each animal.
Source
9 CFR § 71.1
Scoping language
As used in this part, the following terms shall have the meanings set forth in this section.