Certification.
Certification. The following methods may be used to qualify a herd:
(1) By conducting at least two consecutive negative herd blood tests not less than 10 months nor more than 14 months apart; or
(2) As an alternative for dairy cattle, by conducting a minimum of four consecutive negative brucellosis ring tests, or other official brucellosis milk test approved by the Administrator, at not less than 90-day intervals, followed by a negative herd blood test within 90 days after the last negative brucellosis ring test or other official brucellosis milk test approved by the Administrator.