32 C.F.R. § 776.30 – Successive Government and private employment.

(a) Except as the law or regulations may otherwise expressly permit, a former covered USG attorney, who has information known to be confidential Government information about a person that was acquired while a covered USG attorney, may not represent a private client whose interests are adverse to that person in a matter in which the information could be used to the material disadvantage of that person. The former covered USG attorney may continue association with a firm, partnership, or association representing any such client only if the disqualified covered USG attorney is screened from any participation in the matter and is apportioned no part of the fee or any other benefit therefrom.
1. (1) The disqualified former covered USG attorney must ensure that he or she is screened from any participation in the matter and is apportioned no part of the fee or any other benefit therefrom; and,
2. (2) Must provide written notice promptly to the appropriate Government agency to enable it to ascertain compliance with the provisions of applicable law and regulations.
(b) Except as the law or regulations may otherwise expressly permit, a former covered USG attorney, who has information known to be confidential Government information about a person which was acquired while a covered USG attorney, may not represent a private client whose interests are adverse to that person in a matter in which the information could be used to the material disadvantage of that person. The former covered USG attorney may continue association with a firm, partnership, or association representing any such client only if the disqualified covered USG attorney is screened from any participation in the matter and is apportioned no part of the fee or any other benefit therefrom.
(c) Except as the law or regulations may otherwise expressly permit, a covered USG attorney shall not:
1. (1) Participate in a matter in which the covered USG attorney participated personally and substantially while in private practice or nongovernmental employment, unless under applicable law no one is, or by lawful delegation may be, authorized to act in the covered USG attorney's stead in the matter; or,
2. (2) Negotiate for private employment with any person who is involved as a party or as attorney for a party in a matter in which the covered USG attorney is participating personally and substantially.
(d) As used in this paragraph (d), the term “matter” includes:
1. (1) Any judicial or other proceeding, application, request for a ruling or other determination, contract, claim, controversy, investigation, charge, accusation, arrest, or other particular matter involving a specific party or parties, and
2. (2) Any other matter covered by the conflict-of-interest rules of the DoD, DoN, or other appropriate Government agency.
(e) As used in the rule, the term “confidential Governmental information” means information that has been obtained under Governmental authority and that, at the time this Rule is applied, the Government is prohibited by law or regulations from disclosing to the public or has a legal privilege not to disclose, and that is not otherwise available to the public.
(f) [Reserved]