When the certificate, registration, permit, or license of any person certified, registered, permitted, or licensed by one of the health regulatory boards has been revoked, the board may, after three years and upon the payment of a fee prescribed by the board, consider an application for reinstatement of a certificate, registration, permit, or license in the same manner as the original certificates, registrations, permits, or licenses are granted; however, if a license has been revoked pursuant to subdivision A 19 of § 54.1-2915, the board shall not consider an application for reinstatement until five years have passed since revocation. A board shall conduct an investigation and review an application for reinstatement after revocation to determine whether there are causes for denial of the application. The burden of proof shall be on the applicant to show by clear and convincing evidence that he is safe and competent to practice. The reinstatement of a certificate, registration, permit, or license shall require the affirmative vote of three-fourths of the members at the hearing. In the discretion of the board, such reinstatement may be granted without further examination.