C-24.2, r. 51 - Regulation respecting road vehicles adapted for the transportation of handicapped persons
13. The heating system supply lines shall comply with the following requirements:
(1) they shall be solidly attached so as to protect them against wear due to vibrations;
(2) they shall not be suspended from the chassis nor rub against it or any sharp edge that might damage them;
(3) inside the passenger compartment, they shall be sufficiently shielded to avoid any burn to the driver and passengers in the case of breakage.