12 CFR 211.27: Disclosure of supervisory information to foreign supervisors.

(a) Disclosure by Board. The Board may disclose information obtained in the course of exercising its supervisory or examination authority to a foreign bank regulatory or supervisory authority, if the Board determines that disclosure is appropriate for bank supervisory or regulatory purposes and will not prejudice the interests of the United States.

(b) Confidentiality. Before making any disclosure of information pursuant to paragraph (a) of this section, the Board shall obtain, to the extent necessary, the agreement of the foreign bank regulatory or supervisory authority to maintain the confidentiality of such information to the extent possible under applicable law.