PART 5Operations
CHAPTER 2Operational rules for Non-Part-21 aircraft
SECTION 5Operation of radio and navigation equipment
Height keeping performance – aircraft registered in the United Kingdom82.
(1)
An aircraft registered in the United Kingdom must not fly in Reduced Vertical Separation Minimum airspace unless—
(a)
it is equipped with height keeping systems which enable the aircraft to maintain the required height keeping performance capability; or
(b)
it is otherwise authorised by the appropriate air traffic control unit.
(2)
The equipment required by paragraph (1) must—
(a)
be approved by F1... the CAA;
(b)
be installed in a manner approved by the CAA;
(c)
be maintained in a manner approved by the CAA; and
(d)
while the aircraft is flying in that airspace, be operated in accordance with procedures approved by the CAA.