Responsibility for compliance with the specifications set forth in Sections 1769.06 and 1769.07 shall be as follows:
   (a)    As to buildings occupied by a business establishment which does not share the exterior openings of such building with any other business establishment, the person operating such business shall be responsible.
   (b)    As to buildings occupied by two or more business establishments who share the same exterior openings of such building, the owner of the building, or his agent having charge, care or control of such building, shall be responsible.
      (1978 Code Sec. 5-28)