As legal markets for recreational marijuana continue to open up in the U.S., and public opinion about responsible marijuana use slides towards acceptance, the requirements for employment-related drug testing are slowly evolving to meet the moment. News articles and blog posts about changes to employment related drug testing laws typically have a standard caveat that employers with workers covered by the U.S. Department of Transportation’s regulations are likely not impacted by whatever change in the law is being discussed. This blog post, however, addresses a recent change to the DOT’s rules. Specifically, the DOT announced a new testing option that employers subject to its regulations can use in order to get a more accurate picture of workers’ recent marijuana use.