Regulation 121—Transportation of explosives by railA person who transports explosives in a carriage by rail shall ensure that(a) the compartments of each carriage in which explosives are carried are lined internally with wood which has been rendered non-inflammable or with another material approved by the Chief Inspector;(b) the compartments of the carriage in which explosives are carried are suitably enclosed and locked;(c) the carriages in which the explosives are transported are separated from the locomotive by one empty carriage.