This document discusses new regulations for advertising marijuana as legalization spreads to more states. It provides background on marijuana legalization in the United States, noting that it is now legal medically or recreationally in 26 states. As legalization increases, advertising regulation is emerging to treat marijuana similarly to alcohol and tobacco. Currently, advertising is an uncharted area as laws vary by state and federal law still classifies marijuana as illegal. The MAILS Act of 2016 created an exception allowing written marijuana advertisements that comply with state laws. Recent case law in Colorado upheld regulations requiring magazines focused on marijuana to only be sold in licensed stores.