Article 92 Height keeping performance - aircraft registered in the TerritoryI1
United Kingdom
An aircraft registered in the Territory must not fly in reduced vertical separation minimum airspace unless—
the aircraft has been approved by the Governor for operations in such airspace;
the operator has been approved by the Governor; and
while the aircraft is flying in the airspace, it is operated in accordance with operating procedures approved by the Governor.
An aircraft need not comply with the requirements of paragraph (1) where the flight has been authorised by the appropriate air traffic control unit notwithstanding the lack of compliance and provided that the aircraft complies with any instructions the air traffic control unit may give in the particular case.
For the purposes of this article and article 93, “reduced vertical separation minimum airspace” means airspace which has been notified, prescribed or otherwise designated as such by the competent authority for the airspace and where a reduced vertical separation minimum of 1000 feet (300 m) applies above flight level 290.