CHARLOTTE, N.C. -- You need to know about several state laws that take effect today in North Carolina.

Teenage drivers can no longer talk on a cell phone behind the wheel.

The law effects teens under the age of 18.

There are a few exceptions to the law.

Teens will be able to use their cell phone for an emergency or to call their parents or guardians.

A second new law going into effect today, helps state law enforcement agents track violent sexual predators.

Beginning today, agents will use new GPS devices to track habitual and violent sex offenders.

Its a lifelong tracking system for offenders.

A new seatbelt law now requires passengers in the back seat of a vehicle to wear a seatbelt.

Until now, only people in the front seats and children under 16 had to buckle up.

Troopers will hand out warnings beginning today.

Finally, it's now against to law to drive or operate a bicycle or lawn mower if you are legally drunk.