Canada Immigration and Refugee Protection Regulations (IRPR)
Division 3
Work Without a Permit
No permit required
186. A foreign national may work in Canada without a work permit
(s) as a member of a crew who is employed by a foreign company aboard a means of transportation that
(i) is foreign-owned and not registered in Canada, and
(ii) is engaged primarily in international transportation;
As CX Canada is onshored and deemed a Canadian Employer for immigration and employment purposes the above does not apply, as one of the conditions clearly states that the crew member has to be employed by a "foreign company".