The definition of a Critical Injury under Regulation 834 of the Ontario Occupational Health and Safety Act. is clear for all employers when determining what injury needs to be reported in the workplace. 1. The employer and/or constructor must immediately notify the Ministry of Labour (1-877-202-0008), the company Joint Health and Safety Committee Representative (20 employees or more), or the Health and Safety Representative(when over 5 employees), and finally the worker trade Union if applicable. 2. Employer must send a written report of the circumstances of the occurrence to the Ministry of Labour Inspector assigned within 48 hours. 3. The scene where the occurrence and/or incident occurred must not be altered in any way without the permission of an inspector which generally results in no further work being done in that area until the inspector releases the scene.