A gas compliance certificate is issued to the owner or user of the gas appliance to demonstrate that it is compliant with the required safety standards. It not only recognises that your gas system is installed by a licensed gas fitter, but also ensures your gas supply and appliances are safe for use. Gas compliance certificates are required when your gas in connected for the first time or reconnected, as well as when installing or replacing existing appliances, and must be issued within 30 days of work being completed.