(1)A person commits an offence if he enters into or becomes concerned in an arrangement which he knows or suspects facilitates (by whatever means) the acquisition, retention, use or control of criminal property by or on behalf of another person.
(2)But a person does not commit such an offence if—
(a)he makes an authorised disclosure under section 338 and (if the disclosure is made before he does the act mentioned in subsection (1)) he has the appropriate consent;
(b)he intended to make such a disclosure but had a reasonable excuse for not doing so;
(c)the act he does is done in carrying out a function he has relating to the enforcement of any provision of this Act or of any other enactment relating to criminal conduct or benefit from criminal conduct.