BREAKING: President Donald Trump signed an executive order Dec. 18 to federally classify marijuana as a less dangerous substance, the biggest change for the drug since 1970 and an opportunity for the industry to operate more easily.

Trump’s order would stop classifying marijuana as a Schedule I drug, which includes the most dangerous substances such as heroin, LSD and ecstasy. The Drug Enforcement Administration describes Schedule I substances as having no "medical use and a high potential for abuse."

Instead, Trump ordered that marijuana be classified as a Schedule III drug, which the DEA describes as having "a moderate to low potential for physical and psychological dependence."