As used in this act:
The term shall also include an administrative or supervisory employee of a law enforcement unit or the State whose duties include general or direct supervision of employees engaged in investigation, apprehension or detention activities or training responsibility for these employees and a requirement for engagement in investigation, apprehension or detention activities if necessary, and who is authorized to carry a firearm while in the actual performance of his official duties and has police powers.
N.J.S. § 43:16A-1