2.—(1) The following sub-paragraphs of this paragraph shall only apply to large containers and wagons constructed after 31 December 1996.
(2) No metal objects shall be allowed to protrude in the interior of any large container or wagon used for the carriage of explosives, other than those metal objects which form part of the construction of the large container or wagon concerned.
(3) Packages labelled as containing explosive articles or substances in a Division whose Division number is 1.1, 1.2, 1.3, 1.5 or 1.6 shall only be carried in wagons or large containers which have been fitted with regulation sheet steel spark-guards.
(4) The regulation sheet steel spark-guards referred to in sub-paragraph (3) above shall not be fixed directly to the floor of the wagon or large container concerned where that floor is made of wood.