Requirements for take-off — helicopters
59.—(1)  Despite regulations 56 and 57, where a relevant aircraft is a helicopter, the pilot‑in‑command may commence a take‑off —
(a)when the reported meteorological visibility at the departure heliport is below that required to take‑off and the runway visual range is not reported; or
(b)when there is no reported meteorological visibility or runway visual range available for the departure heliport,
if the pilot-in-command can determine that the runway visual range and visibility along the take‑off final approach and take‑off area and runway are equal to or better than the required minima.
(2)  Where a relevant aircraft is a helicopter that is operating under Performance Class 2, the pilot-in-command must remain clear of cloud during the take‑off manoeuvre until the helicopter reaches Performance Class 1 capabilities.