The mayor of Washington, D.C., Muriel Bowser, has signed a bill allowing non-residents to self-certify as medical marijuana patients while they’re visiting the nation’s capital without the need for any doctor’s recommendation—a move that supporters say could boost tourism. To self-certify, out-of-state applicants who are at least 21 years of age can apply online and pay a non-refundable $30 fee. Washington D.C,. here they come!