In order to comply with the law, the cannabis industry in California will need to issue warnings about their products. Business may choose to do this with warning labels on their products, but they could also choose to put up signs in and around their businesses, or on their websites if they do not have a brick-and-mortar building. They must also ensure that none of their products are “knowingly discharge[ed]… into sources of drinking water.” Businesses with fewer than 10 employees are exempt from Prop 65 requirements, as are government entities.