More and more US states have decriminalized marijuana, Over the past decade, more and more US states have decriminalized marijuana, including the state of Vermont. As of today, there are 23 states plus Washington DC that have medical marijuana laws to help sick people. Here are some quick facts on Vermont's medical marijuana program: Made effective starting May 30, 2007, the medical marijuana program in Vermont, or Senate Bill 76, was signed into law after receiving majority support from the ...