3Gas specification. (a)The Delivering Participant must ensure that all gas delivered to the Receiving Participant at the Delivery Point meets the gas quality specification contained in Australian Standard AS4564-2005, Specification for General Purpose Natural Gas (as amended or replaced from time to time), and any additional gas quality specifications specified for that Delivery Point in schedule 2 or schedule 3 or, in relation to a Pre-matched Trade, any additional gas quality specification specified by the Gas Transporter for the Delivery Point for the Pre-matched Trade.