1. Any license or permit issued by a municipality to a person in order for such person to seek, obtain or maintain employment as a security guard shall be valid in any municipality within a charter county with a population not exceeding three hundred thousand adjoining another first class charter county, or by reciprocal agreement between the municipalities in any other county.

2. For the purposes of this section, the term “security guard” is defined as any person who is not authorized to carry a firearm and who is paid to protect the person or property of another, but shall not include law enforcement officers or any other public official or employee.