Q & A: What does the 2018 Farm Bill mean for CBD Supplements? On December 20, 2018, President Trump signed into law the 2018 Farm Bill, changing the landscape for companies in the hemp industry. However, the devil is in the details, and companies marketing and selling CBD (cannabidiol) as a dietary supplement need to know what the new Farm Bill says … and what it doesn’t say. While the landscape is fluid and still evolving, here are our thoughts as of the moment.