A change of Veterinary regulations was approved during the 2011 FEI General Assembly, which was held in Buenos Aires. Starting January 1, 2013, all horses that are newly-registered with FEI should be microchipped. The microchip must be compatible with ISO 11784 and ISO 11785, and all information on the microchiop should be stated in the passport and reported to the United States Equestrian Federation (USEF). This new requirement is only applicable to the initial FEI registration.
The standard numbers on the microchip consist of 15 digits, the first three digits identify the country code or the manufacturer and the remaining digits are unique and non-duplicated. The technical concept of this special identification for animals is based on the radio-frequency identification principle (RFID). The numbers represent the unique identifier, which will be associated to a specific horse from the date that the microchip was implanted until the death of the animal.
Consult your veterinarian for the availability of the microchip. ISO 11784 and ISO 11785 compliant microchips for implant in horses of US are commonly available.
It is recommended by USEF for horses that are initially registered with FEI after the 31st of December, 2012, to be scanned for any existing microchips before getting a new one implanted.