Section 28.1 - Authority, purpose, and scope(a)Authority. This subpart is issued pursuant to 12 U.S.C. 1 et seq., 24(Seventh), 93a, and 602.(b)Purpose. This subpart sets forth filing requirements for national banks that engage in international operations and clarifies permissible foreign activities of national banks.(c)Scope. This subpart applies to any national bank that engages in international operations through a foreign branch, or acquires an interest in an Edge corporation, Agreement corporation, foreign bank, or certain other foreign organizations.