(1) Where an authorised officer observes a vehicle or combination of vehicles on any occasion on a public road and he suspects that the weight laden of the vehicle or combination or the weight transmitted to the ground by any part of the vehicle or combination is such that the use of the vehicle or combination constitutes an offence under this Act -
(a) in case the officer has with him a mobile weighbridge, the officer may require the person in charge of the vehicle or combination:
(i) to permit the officer to ascertain by means of the mobile weighbridge the weight transmitted to the ground by any part of the vehicle or combination with the load or loads (if any) thereon; and
(ii) to do all such things as may be indicated by the officer and are reasonably necessary to facilitate him in effecting such ascertainment;
(b) in any other case, the officer may require the person in charge of the vehicle or combination to do all or any of the following things:
(i) forthwith to bring the vehicl
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