An armed security guard/officer may carry only the types of firearms that the commissioner prescribes, by rules and regulations, in the performance of the person's duties. A security guard/officer may carry a firearm only if certified to carry the firearm. With proper certification, an unarmed or armed security guard/officer may carry any other type weapon, including, but not be limited to, clubs or batons, stun guns, the chemical spray known as mace or any other tool or weapon that the commissioner may prescribe.