(a) The Investigating Officer(s) may give a promise of confidentiality to any individual who provides evidence for a safety inquiry or investigation to encourage frank communication.

(b) A promise of confidentiality must be explicit.

(c) A promise of confidentiality must be documented in writing.

(d) A promise of confidentiality may be given only as needed to ensure forthright cooperation of a witness and may not be given on a blanket basis to all witnesses.

(e) A promise of confidentiality must inform the witness that it applies only to information given to the Investigating Officer(s) and not to the same information if given to others.