The Workplace Hazardous Materials Information System (WHMIS) is a major breakthrough in occupational health and safety legislation. WHMIS labels and material safety data sheets (MSDSs) provide workers with better hazard information than ever before. While this hazard information is important, it can only begin to reduce injuries, disease and illness when workers understand and use this material. For this reason, the regulations require the employer to implement a WHMIS worker training program.

The training program must be developed for each employer's workplace and be reviewed annually.

The occupational health committee (OHC) or the worker health and safety representative (OH&S Rep) if present, must be consulted in the development and implementation of the program and during its annual review. Where neither a committee nor a representative is present, the workers must be consulted.

The training itself can be conducted by another organization, person or group. However, the final responsibility for providing training remains with the employer.