s 31 Unauthorised trade in weapons or noxious substances
31. A person commits an offence if —(a) the person —(i) imports or exports an object or a thing; or (ii) takes part in any activity in sub‑paragraph (i) in relation to an object or a thing; (b) the object or thing is a weapon or noxious substance; (c) the person knows that, or is reckless as to whether, the object or thing is a weapon or noxious substance; and (d) the person is not one of the following:(i) a person granted a licence to import or export that weapon or noxious substance; (ii) a class licensee authorised under a class licence to import or export that weapon or noxious substance; (iii) a person exempt from this section under section 87, 88 or 89 in relation to the import or export of that weapon or noxious substance.