10 CFR §1708.105

1. (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.
2. (b)A promise of confidentiality must be explicit.
3. (c)A promise of confidentiality must be documented in writing.
4. (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.
5. (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.