the only thing I could find( from VanIsland Traffic Services)
" The majority of problems with exhaust systems after noise usually consist of loose, broken or missing parts. Your vehicle will be rejected for these reasons, as well as having a cutout installed (muffler bypass), if any part of the exhaust system is closer than 48 mm to any part of the fuel or brake system or any combustible material and is not protected by shields, or could burn an occupant while entering or leaving the vehicle.
The tailpipe must be terminated so that exhaust fumes are expelled beyond the outside perimeter of the vehicle, and the termination must not point upward."