December 20, U.S. Department of Agriculture – (National) USDA issues final rule for animal disease traceability. U.S. Department of Agriculture released final guidelines establishing general regulations to improve the traceability of livestock moving across State borders, requiring identification and other documentation.
Source:
http://www.usda.gov/wps/portal/usda/usdahome?contentid=2012/12/0366.xml&content idonly=true