Washington D.C. looking to decriminalize marijuana - The dominoes begin to fall 11/02/2013 - 00:00 It took nearly 15 years after voters approved medical marijuana for it to become available in the District of Columbia, but the next major change to pot laws in the nation's capital is on the fast track.The D.C. Council is poised to approve a bill that would decriminalize possession of small amounts of pot, and Democratic Mayor Vincent Gray announced last month that he supports it. He could sign the bill into law as early as January.