This Fast Fact has been developed to assist Municipal Councils (i.e. mayors, reeve, counsellors, or aldermen) to understand and comply with the Occupational Health and Safety Act (OHSA) and its regulations. Members of council have roles and responsibilities under the OHSA that they must comply with in order to support a safe and healthy workplace. Everyone in the workplace plays a role in the Internal Responsibility System and depending on the scenario, a member of council may be considered a Director or Officer of a Corporation, a Supervisor, or a Worker under the OHSA. Municipal Councils are encouraged to review the definitions and duties of workplace parties outlined in the OHSA.