Idaho Code § 25-610
It shall further be the duty of each veterinarian in the state of Idaho, upon the receipt of such brucellosis test chart from the laboratory, to brand clearly or have branded in his presence in accordance with the U.S. department of agriculture's publication entitled "brucellosis eradication: uniform methods and rules, effective October 1, 2003," and place an official brucellosis reactor tag in the left ear of any animals which show a positive reaction to the test in accordance with the code of federal regulation definition for a reactor. A statement that such reactors have been so branded will be made on the said chart and a copy mailed to the department within forty-eight (48) hours after receipt of said chart. A copy of any brucellosis test chart which does not show positive reactors shall also be mailed to the department within forty-eight (48) hours after receipt of said chart. Failure on the part of any veterinarian authorized by law to make blood tests, appraise reactors, vaccinate cattle or other animals, or issue quarantines shall be cause for revocation of accreditation if he fails to comply with all provisions of this law, and such veterinarian shall no longer be allowed to perform any duties for the state of Idaho until he has been reinstated.
Idaho Code § 25-610