15.—(1) This article applies where there is—
(a)an area of low income (“area A”); and
(b)in relation to area A, a specified adjoining area (“area B”).
(2) Subject to the limit in paragraph (3), where a supplier promotes carbon saving community qualifying actions in area A, the supplier may promote carbon saving community qualifying actions in area B (“adjoining installations”).
(3) The sum total of the carbon savings for adjoining installations which—
(a)are achieved by the supplier; and
(b)relate to area A,
must not exceed 25% of the sum of the carbon savings for all carbon saving community qualifying actions achieved by that supplier in area A.
(4) A supplier must identify, when notifying an adjoining installation under article 17, the areas A and B to which the installation relates.
(5) Only one area A may be notified under paragraph (4) in relation to an adjoining installation.