This Law Firm Publication by Holland & Hart LLP discusses the Department of Justice's (DOJ) August 29, 2013 announcement that it will not challenge state ballot initiatives in Colorado and Washington that legalize the possession and use of small amounts of marijuana under state law. However, the DOJ reaffirmed that marijuana remains an illegal drug under federal law, and stated in its Guidance Regarding Marijuana Enforcement that it expects state and local governments to establish and enforce robust controls in their marijuana regulatory schemes to meet its federal objectives.