"A complete list of acceptable identification devices/methods may be found at www.tahc.state.tx.us, but the most commonly used devices include USDA metal tags, brucellosis calfhood vaccination tags, US origin 840 series
Radio Frequency Identification tags (RFID), and breed registration tattoos or firebrands. Producers are encouraged to contact their veterinarian or TAHC to
determine which method of tagging will be best for their operation." - TAHC.
The USDA metal tags are available at your local extension office.
For more information, please contact your local extension office (for Austin County call 979-865-3602) or the state office TAHC Traceability Team at 1-800-550-8242 ext 733.
Texas Animal Health Comm: http://www.tahc.state.tx.us/
Most common questions - What you need to know: http://www.tahc.state.tx.us/adt/CattleTraceabilityRule-QA.pdf
To read the full press release from the TAHC: http://www.tahc.state.tx.us/news/pr/2012/2012-10-4_ADTEarTagRule.pdf