(1) Where the Secretary of State has reasonable grounds for believing that adequate measures to ensure the security of any dangerous substance kept or used in any relevant premises are not being taken and are unlikely to be taken, he may give a direction to the occupier of the premises requiring him to dispose of the substance.
(a) specify the manner in which, and time by which, the dangerous substance must be disposed of; or
(b) require the occupier to produce the dangerous substance to a person specified or described in the notice in a manner and by a time so specified for him to dispose of.