California Code, Financial Code - FIN § 6551

(a) An agency of an association is a place or facility, stationary or mobile, other than the home office, a remote service unit, or a branch office, at or through which the association may transact business that is specified by the board of directors and approved by the commissioner.

(b) The agency may perform other special duties and functions as may be directed from time to time by the home office or a branch office and approved by the commissioner.

(c) An agency may perform only those activities, duties, or functions as are authorized for savings associations by the provisions of this division or regulations of the commissioner.