Regulation 10 Openings, valves and caps to be securely closed before commencement of journey
(1)
Subject to paragraph (2), the consignor of any dangerous goods intended for carriage in a tank container or tank wagon and the operator of the tank container or tank wagon concerned shall ensure that—
(a)
all openings in the tank (container or tank wagon concerned; and
(b)
in the case where any discharge or filling opening in that tank container or tank wagon is fitted with more than one valve or is fitted with a cap, all such valves and that cap,
are securely closed before any journey on the railway is commenced.
(2)
Nothing in paragraph (1) shall be taken as permitting the proper functioning of any safety device to be compromised.