143No offence committed

143 No offence committed A person does not commit an offence against section 137, section 138, section 139, section 141 or section 142 if— (a) the act or omission that would apart from this provision have constituted the offence or an element of the offence was authorised by or under this Act; or (b) in any other case— (i) the act or omission that would apart from this provision have constituted the offence or an element of the offence happened during the conduct of an activity that was, apart from this Act, lawful; and (ii) in conducting the activity, the person was complying with the general environmental duty. Extensions of liability for offences Division 15.2