And what is the impact if businesses do not comply? The enforcement of this law is carried forward with the civil lawsuits that are posed against the violators. These suits can either be brought by the Attorney General of California or any district or city attorney. Private parties too can bring these lawsuits but they can do so only after they provide a proper notice about the alleged violation. According to this regulation, if any product (including both your food and supplement) which is sold in California comes with chemical substances that has been listed in the list of Prop 65 as a chemical that is likely to cause reproductive ailment or cancer, a warning is issued on the product. This warning becomes even more relevant when the chemical exposure is found to be above the level of average safe harbor.