(1) A constable may give to the occupier of any relevant premises a notice requiring him to give the chief officer of police such information as is specified or described in the notice by a time so specified and in a form and manner so specified.
(2) The required information must relate to-
(a) any dangerous substance kept or used in the premises; or
(b) the measures taken (whether by the occupier or any other person) to ensure the security of any such substance.
(3) In this Part references to measures taken to ensure the security of any dangerous substance kept or used in any relevant premises include-
(a) measures taken to ensure the security of any building or site of which the premises form part; and
(b) measures taken for the purpose of ensuring access to the substance is given only to those whose activities require access and only in circumstances that ensure the security of the substance.
(4) In this Part "relevant premises" means any premises- (a) in which any dangerous subs
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