MONGTOMERY, Ala. (AP) — A new law requires that some people convicted of drunken driving install devices that prevent them from starting their vehicles if they have been drinking alcohol.

The new law took effect Sept. 1 and requires the devices on the cars of anyone convicted of driving with a blood alcohol level of 0.15 or higher. But judges are waiting to order that the devices be installed until the details of exactly how the law will be administered are worked out.