(1) No person shall, while he holds any driving licence for the time being in force, hold any other driving licence except a learner’s licence or a driving licence issued in accordance with the provisions of section 18 or a document authorising, in accordance with the rules made under section 139, the person specified therein to drive a motor vehicle.
     (2) No holder of a driving licence or a learner’s licence shall permit it to be used by any other person.
     (3) Nothing in this section shall prevent a licensing authority having the jurisdiction referred to in sub-section (1) of section 9 from adding to the classes of vehicles which the driving licence authorises the holder to drive.