(1) Has for the five years next prior to filing his application been a practicing veterinarian licensed in a state, territory, or district of the United States whose license requirements, at the time the applicant was first licensed, were substantially equivalent to the requirements of this article; or
(2) Has within the three years next prior to filing his application successfully completed an examination conducted by the national board of veterinary examiners.
(b) In its discretion, the board may orally or practically examine any person qualifying for licensing under this section, and may enter into agreements for reciprocal licensing with other jurisdictions having substantially similar requirements for licensure.