(1) If a registrant sells the registered firearm, the registrant must notify the Commissioner with particulars within 7 days after that sale.Penalty: Fine not exceeding 50 penalty units.(2) If a registered firearm or certificate of registration is lost or stolen, the registrant is to notify the Commissioner as soon as practicable but not later than 7 days after becoming aware of that fact with particulars of that loss or theft.Penalty: Fine not exceeding 50 penalty units.