Official vaccination eartag.
Official vaccination eartag. An APHIS approved identification eartag conforming to the alpha-numeric National Uniform Eartagging System which provides unique identification for each animal. The eartag shall have a V followed by 2 letters and 4 numbers. States which require more official vaccination eartags than the number of combinations available in the V series of tags shall use a T or S followed by 2 letters and 4 numbers. Duplicate reissue of official vaccination eartags shall not be made more often than once each 15 years.