In relation to any GSP Group and any Settlement Period, a Metered Volume representing the algebraic sum of: (i) the quantity of Active Energy flowing into a GSP Group at Grid Supply Points connected to that GSP Group and at Distribution Systems Connections Points connected to that GSP Group, and (ii) the quantity of Active Energy flowing out of a GSP Group at Grid Supply Points connected to that GSP Group and at Distribution Systems Connections Points connected to that GSP Group but disregarding Exports and Imports at Boundary Points in that GSP Group.