Attorney General Anne Milgram says trained officers can use them on armed, emotionally disturbed persons who refuse to surrender.
The rules prohibit officers from using stun guns to get people to move, get on the ground or exit a vehicle. Police also can't use the guns on handcuffed suspects or against a person on an elevated surface.
Milgram says it's prudent to have "adequate controls, training and accountability."
The size of the police department will determine the number of officers authorized to carry the weapons.