12 CFR 404.31: Restrictions on testimony and production of records.

Ex-Im Bank personnel may not provide testimony and/or produce records regarding information acquired in the course of their performance of official duties, or due to their official status, in connection with any legal proceeding to which this subpart applies, without authorization by the General Counsel. Such authorization must be in writing, unless the General Counsel determines that circumstances warrant an oral authorization, and such oral authorization is subsequently documented.