Aviation Occupational Health and Safety Regulations

5.15 (1) No person shall use a hazardous substance on board an aircraft if it is reasonably practicable to use a non-hazardous substance in its place.

(2) If a hazardous substance is to be used for any purpose on board an aircraft and an equivalent substance that is less hazardous is available to be used for that purpose, the equivalent substance shall be substituted for the hazardous substance if reasonably practicable.