Taximeter to be sealed and in good order
16.  No holder of a taxi licence shall ply for hire or cause or permit to be plied for hire a taxi for the purpose of gain unless the taximeter —
(a)has been sealed by the Registrar or an authorised officer and every seal which is affixed to the taximeter under these Rules is intact and every part thereof is in good order and condition;
(b)is so adjusted that it will register the fare approved by the Council or hiring charge correctly; and
(c)is affixed to the vehicle in a manner approved by the Registrar.