Beware: There's a beginner on board.

New Jersey has become the first state to require new drivers to display identifying decals on their vehicles in an attempt to curb teen driving deaths, officials said.

The law was signed Wednesday by Gov. Jon S. Corzine and takes effect next year.

Motor vehicle officials said the decals will probably be a small reflective rectangle attached to the front and rear license plates to help police enforce restrictions for provisional drivers.