PART 2Overall carbon emissions reduction target and carbon emissions reduction obligations

Review of obligations by the Authority in relation to suppliers

13.—(1) When the Authority has all suppliers’ domestic customer numbers, either notified under article 7(2) or determined under article 7(3), the Authority must—

(a)review a supplier’s carbon emissions reduction obligation; and

(b)notify a supplier of any amendment to that supplier’s obligation by 14th March immediately following the review.

(2) The review must be carried out by reference to—

(a)the overall carbon emissions reduction target for suppliers in article 3(2)(b);

(b)the effect of any trading under article 21 between—

(i)suppliers; or

(ii)suppliers and generators;

(c)the mean of the total number of domestic customers supplied by suppliers on 31st December 2009 and on each anniversary of that date; and

(d)supplier customer numbers.

(3) Except for a new supplier, supplier customer numbers are the mean of the number of domestic customers supplied by a supplier on—

(a)31st December prior to the commencement of the obligation period; and

(b)each 31st December subsequent to the commencement of the obligation period.

(4) For a new supplier for whom the obligation period commences on 1st April 2010, supplier customer numbers are the mean of—

(a)the number of domestic customers supplied by that supplier on 31st December 2010;

(b)the number of domestic customers supplied by that supplier on 31st December 2009;

(c)zero for 31st December 2008; and

(d)where applicable, the number of domestic customers supplied by that supplier on 31st December 2011.

(5) For a new supplier for whom the obligation period commences on 1st April 2011, supplier customer numbers are the mean of—

(a)the number of domestic customers supplied by that supplier on 31st December 2010;

(b)zero for each 31st December in the years 2008 and 2009; and

(c)the number of domestic customers supplied by that supplier on 31st December 2011.

(6) The number of domestic customers under paragraph (3)(b) on each 31st December subsequent to the commencement of the obligation period, or under paragraph (4)(a), (4)(d) or (5)(c) is deemed to be zero where—

(a)a supplier belongs to a group of companies and that group has fewer than 50,000 domestic customers on that date; or

(b)for any other supplier, that supplier has fewer than 50,000 domestic customers on that date.

(7) When the Authority has determined a supplier’s carbon emissions reduction obligation following a review it must further adjust, if necessary, the obligation to take into account any trading by a supplier under article 21.