The duties of directors and other company officers under s 27 of the model Work Health and Safety Act are explored, along with related duties. Issues considered are: what level of company officer will be caught by the legislation? How will volunteer officers, and officers of nonprofit organisations, be dealt with? What are the courts likely to consider as “due diligence”? This question is considered both in terms of the Act and published guidance, but also against the background of previous court decisions on the concept in the workplace safety area and elsewhere.