Maryland has recently passed two marijuana bills into law: SB 364, which decriminalizes the possession of small amounts of marijuana, and HB 881, a law that allows patients to obtain medical marijuana with the right identification. Having marijuana on you in Maryland is no longer a misdemeanor in these small amounts.
Under SB 364, the possession of less than 10 grams of marijuana becomes a civil offense. So, realistically, it's not really decriminalized. You just get less of a punishment for having it. Initially, a first offense can result in fines of up to $100. On a second offense, you face fines of up to $250. For a third offense, you can be fined up to $500. If you're under 21 and/or a third-time offender, you have to have clinical assessment completed for substance abuse disorder and go through a drug education program.