No savings and loan association or similar corporation existing under the laws of this state or of the United States shall accept deposits in this state except on the premises of an established principal office or branch office operated pursuant to this article. For the purposes of this Code section, the term "branch office" means any office of such association or corporation which is intended to be permanently established in a fixed location and to be operated at such location on substantially a full-time basis.
OCGA § 7-1-777