16. Any person authorised by the Registrar may, on production if so required of his authority, enter any vehicle testing station of that examiner and upon such entry he shall be entitled —
to inspect the station and the apparatus provided at the station for carrying out any examination and watch any examination taking place, including any part of the examination which is carried out otherwise than at the station;
to satisfy himself as to the efficiency of such apparatus and, in the case of any apparatus designed to make any measurement, to require evidence to be furnished to him that it will do so accurately within reasonable limits;
to be furnished with such information as he may reasonably require with respect to any of the matters referred to in this rule.