Canadian Aviation Regulations — 705.201
705.201 (1) No air operator shall operate an aeroplane to carry passengers unless the air operator does so with the minimum number of flight attendants required on each deck. (2) Subject to subsections (4) to (7), the minimum number of flight attendants required on each deck of an aeroplane is determined in accordance with one of the following ratios that is selected by the air operator in respect of the model of that aeroplane: (a) one flight attendant for each unit of 40 passengers or for each portion of such a unit; or (b) one flight attendant for each unit of 50 passenger seats or for each portion of such a unit. (3) A Department of Transport air carrier inspector or a person authorized under subsection 705.27(4) to access the flight deck is not counted as a passenger for the purposes of paragraph (2)(a). (4) An air operator who has selected, in respect of a model of aeroplane, the ratio set out in paragraph (2)(b) shall not operate an aeroplane of that model with only one flight attendant unless (a) the aeroplane has a single deck and is configured for 50 or fewer passenger seats; (b) the aeroplane was certified under (i) part 25, title 14, of the Code of Federal Regulations of the United States, in the version in effect on March 6, 1980 or after that date, (ii) the European Joint Aviation Requirements — Large Aeroplanes (JAR-25), published by the Joint Aviation Authorities, in the version in effect on November 30, 1981 or after that date, (iii) the Certification Specifications, Including Airworthiness Code and Acceptable Means of Compliance, for Large Aeroplanes (CS-25), published by the European Aviation Safety Agency, in the version in effect on October 17, 2003 or after that date, or (iv) Chapter 525 — Transport Category Aeroplanes of the Airworthiness Manual , in the version in effect on July 1, 1986 or after that date; (c) only one flight attendant was used for the emergency evacuation demonstration required for the certification of that model of aeroplane; (d) the air operator’s flight attendant manual indicates how normal and emergency procedures differ depending on whether the aeroplane is operated with one flight attendant or with more than one flight attendant; (e) the flight attendant occupies a flight attendant station that is located near a floor-level exit; and (f) the public address system and the crew member interphone system are operative and are capable of being used at the flight attendant station. (5) If an air operator has selected, in respect of a model of aeroplane, the ratio set out in paragraph (2)(a), but has carried out a successful demonstration of its emergency evacuation procedures for that model using more flight attendants than would have been required in accordance with that ratio, the minimum number of flight attendants required on each deck of an aeroplane of that model that is operated by the air operator is the number of flight attendants used in the demonstration. (6) If an air operator has selected, in respect of a model of aeroplane, the ratio set out in paragraph (2)(b), but has carried out a successful demonstration of its emergency evacuation procedures for that model using more flight attendants than would have been required in accordance with that ratio, the minimum number of flight attendants required on each deck of an aeroplane of that model that is operated by the air operator is the number of flight attendants used in the demonstration. (7) If the emergency evacuation demonstration required for the certification of a model of aeroplane was carried out using more flight attendants than would have been required in accordance with the ratio set out in paragraph (2)(b) and, after the demonstration, an aeroplane of that model is reconfigured for fewer passenger seats, the minimum number of flight attendants required on each deck of the reconfigured aeroplane is the number of flight attendants required in accordance with the ratio set out in paragraph (2)(b) plus an additional