The circumstances set out in this section are where the electricity is—
generated using the original capacity of an onshore wind generating station—
which was accredited on or before 31 March 2017, and
in respect of which the approved development condition is met, or
generated using additional capacity of an onshore wind generating station, where—
the station was accredited on or before the onshore wind closure date,
in the Authority's view, the additional capacity first formed part of the station on or before 31 March 2017, and
the approved development condition is met in respect of the additional capacity.