Rules and Regulations Montana Medical Marijuana Program Rules and Regulations Montana Medical Marijuana Act Administrative Rules of Montana - Medical Marijuana Program Please note the adult use marijuana program established by I-190 is a separate program under Department of Revenue. Please see the Department of Revenue website for further information. Text/HTML The DPHHS website is being redesigned and will be moved to a new platform in July. Please be aware that some bookmarks to the DPHHS site may need to be updated after the move. Thank you for your patience while we complete this move.