The two chambers also have disagreed on how to revamp the state's speed camera law in the wake of a Baltimore Sun investigation that revealed problems with enforcement and administration of Baltimore's system.
Tickets have been issued in error and motorists have sometimes struggled to challenge them in court. And the city and some other jurisdictions have been paying vendors per ticket issued — a so-called "bounty system" the state tried to make illegal when it approved speed cameras in 2009.
The House and the Senate have passed different versions of legislation intended to prevent issuance of bogus tickets, make it easier for motorists to challenge them and more explicitly prohibit contracts that pay by the ticket, which critics say create an incentive for companies to issue them.
Some key senators think the House's version illegally calls for jurisdictions to exit current bounty-system contracts, while some delegates find the Senate version doesn't go far enough to address problems.
A committee is expected to meet Monday morning to seek a compromise. Some lawmakers said whatever passes will send a message that jurisdictions need to be careful.
"We'll be watching everything that happens between now and the next legislative session," said Del. James E. Malone, Jr. a Baltimore County Democrat who introduced the House version. "What I wanted to do is bring some credibility back into the speed camera program, and I think I did that."
Meanwhile, a campaign finance reform bill aimed at closing loopholes for corporate donations hit a snag Saturday.
Delegates objected to changes by senators that would require people seeking public office to declare their candidacy three months earlier than currently required — pushing the deadline from after the annual General Assembly session adjourns in April to before its January start. The House wants campaign contribution limits, which haven't changed in two decades, to be indexed to inflation. The Senate disagrees.
Another committee is expected to meet and work out a deal.
The Senate is expected to give final approval to a bill to make Maryland the 19th state to create a medical marijuana program. That bill is among hundreds that have yet to reach the finish line and still await final passage, including whether to ban using transportation trust fund money for other purposes, whether it should be a crime to drunkenly pilot a sailboat and whether it should be more difficult to petition laws to referendum.
In the absence of a huge unsettled issue, like a tax increase, to suck the political energy out of the State House, lawmakers said most of the day will be dedicated to people scrambling to get bills they're passionate about passed before the clock runs out.
Baltimore Del. Shawn Z. Tarrant, for example, hopes to catapult one of his bills that has languished in the Senate all the way to final passage.
The House on Thursday approved his proposal to suspend the driver's license of anyone caught illegally driving dirt bikes on public streets, a particular problem in the Druid Hill area he represents.
The Senate hasn't even held a hearing on the legislation, but Tarrant is optimistic.
On the final day, he said, anything is possible.