Environmental laws for businesses in Ontario have changed and corporate officers and directors need to understand their personal and affirmative obligation to exercise due diligence to prevent environmental breaches. Offenses are punishable by fines, jail terms, or both, and officers and directors can be convicted for breaching this duty even if the company has not committed or been convicted of an offense under the Act. At the heart of this due diligence obligation is the requirement for an environmental management system. This session outlined the new standard of care expected of officers and directors of Ontario-based businesses, and strategies to ensure ongoing compliance.