Section 02.04.20.103 - OFFICIAL IDENTIFICATION OF CATTLE AND DOMESTIC BISON01.Official Calfhood Vaccinates. Official calfhood vaccinates shall be permanently identified as vaccinates by tattoo and official vaccination eartag. a. Vaccination tattoos shall be applied to the right ear. The tattoo shall start with the letter "R," followed by the U.S. registered "shield and V," followed by a number corresponding to the last digit of the year in which the vaccination was done.b. Official vaccination (orange) eartags shall be applied to the right ear.c. Individual animal registration tattoos or individual animal registration brands may be used for identifying animals in place of official eartags if the cattle or domestic bison are registered by a breed association.02.Official Adult Vaccinates. Official adult vaccinates shall be permanently identified as vaccinates by tattoo and by official identification eartag. Animals that have previously been officially identified as vaccinates shall have the prior official identification recorded on a vaccination certificate or test chart in lieu of the identification provided for in this subsection.a. Adult vaccinated cattle or bison must be identified with a vaccination tattoo applied to the right ear that begins with the letter "R," followed by "AV," followed by the last digit of the year in which the vaccination is performed.b. Official identification (silver) eartags shall be applied to the right ear.c. Individual animal registration tattoos or individual animal registration brands may be used for identifying animals in place of official eartags if the cattle or domestic bison are registered by a breed association.03.Reactor Animals. All animals designated as reactors by the designated brucellosis epidemiologist shall be marked in accordance with the October 1, 2003, Edition of the brucellosis Eradication Uniform Methods and Rules.04.Suspect Animals. All suspect animals shall be marked in accordance with the October 1, 2003 Edition of the brucellosis Eradication Uniform Methods and Rules.05.Spayed Heifers. Spayed heifers may be officially identified by applying a hot iron brand high on the tailhead on either or both sides using an open spade symbol as used in playing cards, of not less than three (3) inches high, or as provided by the administrator.Idaho Admin. Code r. 02.04.20.103