21. The licensee or the competent person shall, before the commencement of a delivery of petrol into any storage tank at the licensed premises—
(a)in Part A of each of two copies of a certificate in the form specified in Part V, in the first column, enter the address of the licensed premises, in the second column, enter the name of the licensee, in the third column, enter the number, letter or number and letter marked on the tank, in the fourth and fifth columns, enter the quantity and grade respectively of petrol which is to be delivered into the tank, in the sixth column, enter his signature (having first visually checked that the ullage in the tank as indicated by the tank measuring device provided in accordance with paragraph 20(1)(b) exceeds the quantity of petrol to be received by that tank) and, in the seventh column, enter the correct date and time; and
(b)having completed Part A of each of two copies of a certificate in the form specified in Part V in the manner specified in sub-paragraph (N), ensure that both those copies are given to the driver who is to make the delivery.