10 C.F.R. § 1708.105 – Promise of confidentiality.

(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.