Every applicant for a license to practice dentistry based on a license in another state or territory of the United States or the District of Columbia shall meet the standards set by the board pursuant to section 38-126 and shall have been actively engaged in the practice of dentistry for at least three years, one of which must be within the three years immediately preceding the application, under a license in another state or territory of the United States or the District of Columbia. Practice in an accredited school or college of dentistry for the purpose of completing a postgraduate or residency program in dentistry also serves as active practice toward meeting this requirement.