MADISON, Wis. -- The state Legislature is expected to pass a bill Wednesday toughening the state's drunken driving law.

The bill would make the first offense a fine if someone under age 16 is in the car. Wisconsin is currently the only state where first offenses are treated like a traffic infraction and not a crime.

The bill also would make the fourth offense a felony if it occurs within five years of a previous offense. It also requires ignition interlock devices for all repeat offenders and for first-time offenders who have a blood alcohol level of more than .15 percent.

Similar bills passed unanimously this fall but there was a disagreement over how to pay for it. Under the bill to be debated, offenders would pay for the expected costs through higher fees.