Article 9 Effect of change of supplier

Where a domestic consumer in relation to whom qualifying action has been completed, or has been begun, ceases to take his supply from the supplier by whom the action was initiated, the improvements in energy efficiency attributable to that action shall accrue to that supplier; but where the consumer becomes a domestic consumer of another supplier before the completion of the qualifying action, the improvements shall accrue to each supplier in the same proportion as the action taken by each of them bears to the totality of the qualifying action.