for heavy truck
http://ccmta.ca/en/home/item/national-safety-code-standard-11-update-2014 click on the image near the bottom of the page and go to page 59, takes effect in MB on sept 1
for light vehicle the requirement for emmision control equipment to be intact has been in palce for a long time1- see Exhaust System, Emission Equipment and Catalytic Converter
With the engine running, visually and audibly inspect:
(a) manifolds
(b) mufflers
(c) resonators (where fitted)
(d) tail pipes
(e) exhaust pipes
(f) mounting hardware
(g) exhaust cut-out
(h) heat shield (applicable vehicles)
(i) tail pipe termination
(j) catalytic converter – (Applies to motor vehicles manufactured on or after January 1,1995)
(k) emission control equipment – (Applies to motor vehicles manufactured on or after January 1,1995)
(a) leaking
(b) leaking, missing, patch not welded
(c) leaking, missing, patch not welded
(d) leaking, missing, patch not welded
(e) leaking, missing, patch not welded
(f) missing, loose
(g) exhaust cut-out is installed
(h) insecure, missing
(i) the installation does not expel the exhaust fumes beyond outside perimeter of the vehicle
trucks – tail pipe does not extend beyond passenger compartment
(j) missing, or replaced with a non-catalytic muffler
(k) any