Canadian Aviation Regulations (SOR/96-433)

705.34 (1) Subject to subsection (2), no person shall conduct a take-off in an aircraft in IMC where weather conditions are at or above the take-off minima, but below the landing minima, for the runway to be used unless an alternate aerodrome is specified in the operational flight plan and that aerodrome is located

• (a) in the case of a twin-engined aircraft, within the distance that can be flown in 60 minutes at the one-engine-inoperative cruise speed; or

• (b) in the case of a three- or four-engined aircraft or where an air operator is authorized in its air operator certificate to conduct ETOPS with the type of aircraft operated, within the distance that can be flown in 120 minutes at the one-engine-inoperative cruise speed.

(2) A person may conduct a take-off in an aircraft in IMC where weather conditions are at or above the take-off minima, but below the landing minima, for the runway to be used, if the weather conditions are at or above the landing minima for another suitable runway at that aerodrome, taking into account the aircraft performance operating limitations specified in Division IV.

(3) For the purposes of section 602.126, a person may conduct a take-off in an aircraft in IMC where weather conditions are below the take-off minima specified in the instrument approach procedure, if the person

• (a) is authorized to do so in an air operator certificate; and

• (b) complies with the Commercial Air Service Standards.

(4) For the purposes of this section, the landing minima are the decision height or the minimum descent altitude and the visibility published for an approach.