A bike commuter pileup on 15th Street NW at Massachusetts Avenue. (Astrid Riecken for The Washington Post)

Updated 12:10 p.m. to clarify that bike shops would be exempted from secondhand dealer rules, not pawn-shop rules.

One bill introduced to the D.C. Council on Tuesday would legalize marijuana; another bill would legalize the sale of used bicycles — or at least make it much easier for established bike shops to do so.

Muriel Bowser (D-Ward 4) introduced a bill that would for the first time exempt bicycles from tough rules meant to regulate the pawn industry second-hand shops. That would make it much easier for bike shops to sell used cycles without having to secure a special license and follow strict recordkeeping requirements.

But it could also raise concerns that it could exacerbate bike thefts in this bike-loving city by offering thieves more opportunities to sell stolen goods.

Bowser said the current rules have “have encouraged a number of bicycle retailers not to get into the used bicycle business” — retailers, she says, who have then sent their used-bike-seeking customers to outlets outside the city to spend their money.

Meanwhile, David P. Grosso (I-At Large) introduced his marijuana legalization measure. It received no co-introducers or co-sponsors. A less sweeping proposal to decriminalize the possession of small amounts of marijuana has won broader support.