11.—(1) This article applies for the purposes of article 9.
(2) Subject to articles 12 and 13 the regulator of an aircraft operator is—
(a)the Environment Agency, where the aircraft operator —
(i)has its registered office or place of residence in England; or
(ii)does not have a registered office or a place of residence in the United Kingdom;
(b)NRW, where the aircraft operator has its registered office or place of residence in Wales;
(c)SEPA, where the aircraft operator has its registered office or place of residence in Scotland;
(d)the chief inspector, where the aircraft operator has its registered office or place of residence in Northern Ireland.