(1) A person must not purchase, sell or have possession of any fish taken or possessed in contravention of this Act or a corresponding law.Penalty: Fine not exceeding 2 000 penalty units or imprisonment for a term not exceeding 1 year, or both.(2) It is a defence in proceedings for an offence under subsection (1) if the defendant establishes that at the time of the alleged offence he or she did not know and could not reasonably be expected to have known that the fish were taken in contravention of this Act or a corresponding law.