This Code specifies the essential requirements for the safe and good practices in gas service work. It concerns the gas installation downstream of the gas service isolation valve (GSIV). It is applicable for the conveyance of town gas or natural gas of up to 50 kPa gauge.\nThis Code covers design, materials, installation, testing, commissioning and maintenance of the gas installations and appliances. The Code is applicable to new gas installations as well as addition and alteration to existing gas installations.