(1) Applicants for registration in cases where the evidence originally presented in the application does not appear to the board conclusive or as warranting the issuance of a certificate may present further evidence, which may include the results of a required examination, for the consideration of the board.
(2) Any applicant who fails the examination twice shall not be admitted to another examination unless the applicant demonstrates to the board's satisfaction that the applicant has diligently studied the subjects covered on the examination.