8.—(1) The circumstances set out in this Article are where the electricity is—
(a)generated using the original capacity of a large onshore wind generating station—
(i)which was accredited during the period beginning with 1st April 2017 and ending with 31st December 2017, and
(ii)in respect of which both the approved development condition and the investment freezing condition are met, or
(b)generating using additional capacity of a large onshore wind generating station, where—
(i)the station was accredited on or before 31st March 2016,
(ii)in the Authority’s view, the additional capacity first formed part of the station during the period beginning with 1st April 2017 and ending with 31st December 2017, and
(iii)both the approved development condition and the investment freezing condition are met in respect of the additional capacity.