Provides that where in Northern Ireland a firearm is lost or stolen the certificate or permit holder must notify the Chief Constable immediately. Where a firearm, which has been ballistically tested under Article 54, is subsequently repaired or altered, the certificate or permit holder must notify the Chief Constable within 72 hours. If a firearm is destroyed or deactivated, the Chief Constable must be notified within 7 days. The Article prescribes the content of the notice. Failure to comply is an offence.