3(1)Every tariff customer of a public gas supplier shall, if required to do so by the supplier, take his supply through a meter, and in default of his doing so the supplier may refuse to give or discontinue the supply of gas.
(2)A public gas supplier shall if so required by a tariff customers, supply to the customer, whether by way of sale, hire or loan, an appropriate meter (whether a prepayment meter or otherwise) for ascertaining the quantity of gas supplied by him ; but in the case of a supply by way of hire or loan the customer shall, if so required by the supplier, before receiving the meter give to the supplier reasonable security for the due performance of his obligation to take proper care of it.
(3)Where any money is deposited with a public gas supplier by way of security in pursuance of this paragraph, the supplier shall pay interest, at such rate as may from time to time be fixed by the supplier with the approval of the Director, on every sum of 50p so deposited for every three months during which it remains in the hands of the supplier.