The Manitoba Law on Imported US RV'sFrom Page 10 of that Official document from the governments website;
"If you plan to import a vehicle from the United States, you need to know if it qualifies for importation under Transport Canada’s Registrar of Imported Vehicles (RIV) program. The program ensures that qualified vehicles imported from the United States are brought into compliance with basic Canadian Safety Standards and properly inspected.
These units still require compliance to the CSA Z240 construction codes, which is a Standards inspection conducted by Inspectors at the Office of the Fire Commissioner."
Seems pretty clear.