In Ontario, WHMIS applies to all workplaces covered by the Occupational Health and Safety Act, and to all federal government workplaces.

The Act does not apply to:

Federal workplaces are covered under a different law: the Canada Labour Code. However, federal authorities accept that outside contractors and their employees, while in federal workplaces, are under provincial jurisdiction. If there is any question about whether you or your workplace is covered by the Act, contact your nearest Ministry of Labour office