Section 13. Declaration by person keeping vehicle, for use

(1) The owner or operator of every motor vehicle shall make a declaration in respect of it in the prescribed form and shall deliver the declaration within the prescribed time to the Taxation Officer and shall pay to him the tax or the additional tax which he appears by such declaration to the liable to pay in respect of such vehicle, as required by of under this Act. (2) Where a motor vehicle is altered so as to render the owner or operator thereof liable to payment of enhanced tax or additional tax under Section 14, such owner of operator shall make, within the prescribed time, an additional declaration in the prescribed form showing the nature of the alteration made and shall deliver it to the Taxation Officer and shall pay to him the difference in tax or additional tax payable under Section 14.