USDA published its new proposed rule for mandatory livestock identification in the Federal Register earlier this month.
According to USDA:
"Under the proposed rule, unless specifically exempted, livestock moved interstate would have to be officially identified and accompanied by an interstate certificate of veterinary inspection or other documentation, such as owner-shipper statements or brand certificates. The proposed rule encourages the use of low-cost technology and specifies approved forms of official identification for each species, such as metal ear tags for cattle. However, recognizing the importance and prevalence of other identifications in certain regions, shipping and receiving states or tribes are permitted to agree upon alternative forms of identification such as brands or tattoos."
You can find the proposed rule here: www.ofr.gov/.
Comments for the proposed rule will be accepted until Nov. 9. Send comments to Docket No. APHIS-2009-0091, Regulatory Analysis and Development, PPD, APHIS, Station 3A-03.8, 4700 River Road, Unit 118, Riverdale, MD 20737-1238.