(a) The following records and papers of the board are confidential and are not public records:
(i) Letters of inquiry and reference concerning applicants;
(ii) Completed applications and verification and inquiry forms;
(iii) Transcripts of educational institutions;
(iv) Investigative and disciplinary matters dismissed without action; and (v) Files relating to complaints and investigations until a formal hearing is concluded or until final disciplinary action is taken if no hearing is commenced. This paragraph does not prevent use of the board files in a hearing.