Without prejudice to the criminal law proceedings, in any proceedings against a person for a contravention of sections MAM-2.1, MAM-2.2 or MAM-2.3, it is not necessary for the prosecution or plaintiff to prove the absence of facts or circumstances which if they existed would, by virtue of rules MAM-2.5 to MAM-2.15 or any other CBB regulations, preclude the act from constituting a contravention of sections MAM-2.1, MAM-2.2 or MAM-2.3 as the case may be.