162. Any police officer or any Inspector of Motor Vehicles authorised in this behalf or other person authorised in this behalf by the ¹[Authority] may, if he has reason to believe that a motor vehicle has been or is being used in contravention of the provisions of sub section (1) of section 32 or without the certificate of fitness required by sub section (1) of section 47 or without the permit required by sub section (1) of section 51 or in contravention of any condition of such permit relating to the route on which or the area in which or the purpose for which the vehicle may be used, seize and detain the vehicle, and for this purpose take or cause to be taken any steps he may consider proper for the temporary safe custody of the vehicle: Provided that, where any such officer or person has reason to believe that a vehicle has been or is being used without the certificate of fitness required by sub section (1) of section 47 or without the permit required by sub section (1) of section 51, he may, instead of seizing the vehicle, seize the certificate of registration of the vehicle, and shall issue an acknowledgement in respect thereof.