5.—(1) the renewables obligation is imposed on each electricity supplier supplying electricity in Northern Ireland (a “designated electricity supplier”).
(2) The renewables obligation is that, subject to Articles 40 and 41 each designated electricity supplier must, by the specified day, produce to the Authority, in respect of each megawatt hour of electricity that he supplies to customers in Northern Ireland during an obligation period—
(a)subject to sub-paragraph (b), the number of renewables obligation certificates determined in accordance with Article 12;
(b)where the obligation period commences on 1st April 2009, 0.035 renewables obligation certificates for each megawatt hour so supplied.
(3) To enable the number referred to in paragraph (2)(a) to be determined, the Department must first determine, for the obligation period in question, [F1calculations A and B] and the total number of renewables obligation certificates required to be produced by designated electricity suppliers in accordance with Articles 6 to 11.
(4) Where the number of renewable obligation certificates that a designated electricity supplier is required to produce by virtue of paragraph (2) is not a whole number, it is to be rounded to the nearest whole number (one-half being rounded upwards).