ag complies with USDA animal traceability requirements, may be used in interstate commerce, and is required at certain exhibitions, fairs, and auctions. Unique 15-digit identification numbers are stored and printed on each single-use, tamper-resistant Full-Duplex (FDX) label. Your farm identification number is assigned to the series of tag numbers that you send, and the information is stored in the NAIS database. Each tag can be verified visually by looking at the printed tag ID number or automatically verified with a reader. Apply with Y-Tex Ultra Tagger Plus for EID and Tamperproof tags