Any state or national bank whose principal place of business is located in Lee County, Alabama, may establish, maintain, and operate additional offices or additional branch banks for the receipt of deposits, payment of checks, lending of money, and conduct of a general banking business in Notasulga, Macon County, Alabama, with prior written approval of the State Superintendent of Banks in the case of a state bank or of the Comptroller of the Currency in the case of a national bank. The authority granted in this section may be exercised by opening a new office or by relocating some existing office.