19.—(1) Where two or more generating stations constitute a group for the purposes of this Article, the Authority shall be entitled to issue a NIROC in respect of electricity generated by those generating stations if, and only if—
(a)the amount of electricity generated by each of them (calculated in accordance with Article 21(2)(a) and (b)) is added together and rounded (in accordance with Article 21(2)(c)),
(b)that rounded amount is stated in the NIROC, and
(c)the NIROC certifies the matters within Article 54(2ZA) or (2ZC) of the Energy Order.
(2) Where an agent appointed under Article 15 acts for two or more generating stations which constitute a group for the purposes of this Article, he shall provide the Authority with—
(a)a figure representing the amount of electricity which he believes should be stated in any NIROC to be issued in respect of that group, and
(b)the data which led him to arrive at that figure.
(3) Two or more generating stations constitute a group for the purposes of this Article where—
(a)they have been accredited as generating stations capable of generating electricity from the same eligible renewable source;
(b)in respect of each of them the same person has been appointed to act as agent under Article 15; and
(c)in respect of electricity generated by them, entitlement to NIROCs is determined in the same way (either on a monthly basis or on an annual basis, depending on whether a notice has been given to the Authority under Article 24(2) or not).