In most cases, people who are in Canada temporarily are not allowed to work without a work permit. However, there are some exceptions, as follows:

• International students with valid study permits (part-time work during the academic year, and full-time work during scheduled study breaks)
• Business visitors, conference organizers and public speakers
• Foreign representatives and their family members
• Athletes and their coaches/team members, and judges, referees and umpires
• In-flight security officers and American cross-border law enforcement officers
• Media crews, including reporters, journalists, technicians and camera crews
• Military personnel and foreign government officers
• Emergency service providers
• Civil aviation inspectors
• Clergy
• The crews of commercial carriers, such as airlines and trains
• Expert witnesses and investigators
• Accident or aviation investigators
• Examiners, evaluators and adjudicators
• People with implied status (for example, international students who are awaiting renewed study permits)