(1)A customs officer or constable may seize any cash if he has reasonable grounds for suspecting that it is—
(a)recoverable property, or
(b)intended by any person for use in unlawful conduct.
(2)A customs officer or constable may also seize cash part of which he has reasonable grounds for suspecting to be—
(a)recoverable property, or
(b)intended by any person for use in unlawful conduct,
if it is not reasonably practicable to seize only that part.
(3)This section does not authorise the seizure of an amount of cash if it or, as the case may be, the part to which his suspicion relates, is less than the minimum amount.