Use and authority of certificate of registration.
Section 13
SEC. 13. Use and authority of certificate of registration.—(a) The said certificate shall be preserved and carried in the car by the owner as evidence of the registration of the motor vehicle described therein, and shall be attached to and presented with subsequent applications for re-registration or transfer of ownership, on penalty of refusal by the Director of Public Works to re-register or transfer, until the said certificate is presented or a duplicate purchase as Provided in this Act. (b) The certificate of registration issued under the provisions of this Act for any motor vehicle shall, while the same is valid and effective and has not been suspended or revoked, authorize such motor vehicle to be used and operated on all public highways in any province, city, or municipality of the Philippine Islands. (c) No motor vehicle shall be operated on the public highways in a manner which would place it under a classification requiring a larger registration fee than that stated in the certificate of registration.