32-1-806. Trust offices of affiliated banks. Notwithstanding the provisions of 32-1-372, a bank having trust powers may be authorized by the department or by the comptroller of the currency, in the case of a national banking association, to maintain a trust office at any one or more locations in this state in the same building with the main office of any affiliated bank which on January 1, 1975, was authorized to act in fiduciary capacities.