31 CFR 1029.320(d)(2)
Prohibition on disclosures by government authorities. A Federal, state, local, territorial, or tribal government authority, or any director, officer, employee, or agent of any of the foregoing, shall not disclose a SAR, or any information that would reveal the existence of a SAR, except as necessary to fulfill official duties consistent with Title II of the Bank Secrecy Act. For purposes of this section, official duties shall not include the disclosure of a SAR, or any information that would reveal the existence of a SAR, in response to a request for disclosure of non-public information or a request for use in a private legal proceeding, including a request pursuant to 31 CFR 1.11.