(1) A person must not, without reasonable excuse, resist, obstruct or attempt to obstruct an authorised officer in the exercise of the authorised officer's functions under this Act.Penalty: Fine not exceeding 500 penalty units.(2) A person must not impersonate an authorised officer.Penalty: Fine not exceeding 100 penalty units.(3) A person must not threaten, intimidate or assault an authorised officer in the exercise of the authorised officer's functions under this Act.Penalty: Fine not exceeding 500 penalty units.