Operating in icing conditions — ground procedures
26.—(1)  For every flight mentioned in regulation 3(1)(a) or (b), the pilot‑in‑command must not operate the aircraft in conditions where ground icing is known or suspected to be present, unless the aircraft —
(a)is inspected for icing; and
(b)is given such de‑icing and anti‑icing treatment as may be required upon inspection.
(2)  For every flight mentioned in regulation 3(1)(a) or (b), the pilot‑in‑command must not perform a take‑off in the aircraft if —
(a)the aircraft has snow, ice or frost adhering to any wing, rotor, stabiliser or control surface of the aircraft; or
(b)the aircraft has frost adhering to any propeller, windscreen or engine installation,
unless such action is specifically permitted by the aircraft’s flight manual and the take‑off is performed in accordance with the procedures in the aircraft’s flight manual.