14. During the whole time of a delivery of petrol from a road tanker, the driver of that tanker shall remain near it, and shall—
(a)so far as is practicable, keep a constant watch on—
(i)the delivery hose (whether a single length or segmented), the connections at both ends of the delivery hose and (in the case of a segmented hose) each connection between the segments,
(ii)(where the provisions of paragraph 7 apply to the delivery) the balance hose and the connections at both ends of that hose, 'and vapour
(iii)the carrying tank of the road tanker; and
(b)ensure, so far as is practicable, that no petrol escapes from any hose connection such as is specified in sub-paragraph (a)(i).