Low visibility operations
23.—(1)  Where low visibility operations are in effect, a certified operator of an aerodrome must minimise the following activities from being carried out, in order to ensure aviation safety:
(a)any activity or movement by any person or vehicle on an apron of the aerodrome;
(b)any construction or maintenance activity in the proximity of the electrical systems of the aerodrome.
(2)  In this regulation —
“low visibility operations” means —
(a)a Category II or III approach and landing; or
(b)a take‑off with a runway visual range of less than 400 metres, or any higher value specified in the Aeronautical Information Publication;
“runway visual range” means the range over which the pilot of an aircraft on the centre line of a runway can see —
(a)the runway surface markings;
(b)the lights delineating the runway; or
(c)the lights identifying its centre line.