Gov. Mark Dayton signed a bill into law May 29 that makes Minnesota the 22nd medical marijuana state. Patient advocates celebrated the passage of SF 2470, which will protect qualified patients from arrest, prosecution and discrimination, and license two manufacturers and eight distribution centers. However, advocates voiced concern that the law prohibits smoking medical marijuana, as well as the use and possession of cannabis in herbaceous form. The bill empowers "health care practitioners" to recommend marijuana to patients with cancer, multiple sclerosis, HIV/AIDS, chronic pain, seizures, and a range of other medical conditions. However, the law limits medical marijuana use to oil that is extracted from the plant using a state-licensed manufacturing process. The law requires the state to start supplying patients with medical marijuana oil by July 1, 2015.