Section 7
SEC. 7. At all times, while using the public highways, every motor vehicle of more than three wheels shall display in conspicuous places, one in the front and one in the rear thereof, the identification number plates described in sections eight and nine of this Act, and every motor vehicle of less than four wheels shall display one such number plate in a conspicuous place in the rear thereof. Such number plates shall be kept clean and cared for, and shall be firmly affixed so that the numbers thereon may at all times be visible and legible whether the motor vehicle is in motion or not: Provided, however, That in case no number plates are available, the Director of Public Works or his deputies may issue a written permit temporarily authorizing the operation of any motor vehicle without such number plates. Any person convicted of a violation of the provisions of this section shall be punished by a fine of not less than ten nor more than two hundred pesos.