Regulation 10 Powers of seizure
— A constable who is, by virtue of regulation 9(1) above, lawfully on any premises may seize any thing where he has reasonable grounds for believing that such seizure is—
(a)
necessary for the protection of the constable or any person accompanying him; or
(b)
otherwise essential to effect seizure of the specimen referred to in that paragraph; or
(c)
necessary for the conservation of evidence; or
(d)
in the interests of the welfare of the specimen.