Over the last several years, several countries have taken steps to encourage and, to a lesser degree, compel businesses to deal with human rights and environmental issues within their own organizations and in their supply chains. The UK’s Modern Slavery Act 2015 is a good example, requiring companies to report their efforts to prevent slavery and human rights trafficking in their supply chains. What started out as non-binding guidance from the United Nations has been made into directly effective “hard law” in an increasing number of countries. The most recent example comes from France, which has imposed on large French companies a new “duty of vigilance” with significant fines for noncompliance. While the law will not go into effect until after review by the country’s Constitutional Council, the new measure signals that the movement toward codification of principles derived from non-binding international guidance is not stopping anytime soon and that enforcement provisions are beginning to get serious.