The Senate responded to the maiming of Denver teenager Molly Bloom, who was dragged under a limousine on prom night last year, by giving initial approval to a bill requiring criminal-background checks on limo, taxi and other commercial drivers.

"I think this bill will give more assurance to passengers and tourists that whoever is driving them around is not only qualified, but has a safe character," said Sen. Suzanne Williams, D-Aurora, sponsor of House Bill 1065 with Rep. Jack Pommer, D-Boulder.

Only after the then-17-year- old girl lost her leg last May did her parents learn that the limo driver had two previous DUI citations and was a registered sex offender barred from contact with minors.

Stanley Sample, 38, was convicted last month of careless driving resulting in serious bodily injury.

The bill, which is scheduled for final Senate passage Monday and then awaits the governor's signature, is not likely to take effect in time for the spring prom season.