Airborne Collision Avoidance System (ACAS II)
123.—(1)  An AOC holder must ensure that every small aeroplane that —
(a)is turbine-powered; and
(b)has an MCTOM exceeding 5,700 kg,
is equipped with ACAS II.
(2)  The ACAS II provided in accordance with paragraph (1) must operate in accordance with the relevant provisions of Volume IV of Annex 10 to the Chicago Convention.