Nothing in this Article shall be construed as applying to spur or side tracks provided for in subdivision fifty-two (52) of section forty-nine (49) of this Charter, nor to require the operators of refrigeration or storage facilities or the carriers of freight or passengers not operating over a fixed route, or other public utilities or services not specifically listed in section seventy-five (75), to obtain a franchise to operate within the City unless required so to do by ordinance of the City of Berkeley.