Payment of road user charge
13.—(1)  The driver of a motor car in respect of which a road user charge referred to in rule 12 is payable shall, when leaving Singapore by way of a relevant checkpoint, insert the vehicle entry card in relation to that motor car into a card machine at the relevant checkpoint so that such road user charge may be deducted from the stored value of the card.
(2)  Upon completion of the transaction referred to in paragraph (1), the driver may obtain a receipt setting out particulars of the transaction from a designated terminal of the Authority at the relevant checkpoint.
(3)  Where the vehicle entry card or card machine is defective, the road user charge shall be paid in such manner as the Registrar considers appropriate.
(4)  The Registrar may, in his discretion and in such circumstances as he considers appropriate, permit the road user charge to be paid in any other manner.