This document summarizes key aspects of occupational health and safety regulations in Canada, including: 1) It outlines the internal responsibility system where workplace parties share responsibility for health and safety and must work together to identify hazards. 2) It describes the rights of workers including the right to know about hazards, participate in health and safety, and refuse dangerous work. 3) It details the duties of employers, supervisors, workers, constructors, directors and officers to take precautions to protect worker safety. 4) Reporting obligations for workplace accidents and critical injuries are also summarized.