"Firefighter" shall mean a permanent, full-time, paid employee of a firefighting unit whose primary duties include the control and extinguishment of fires and who is subject to the training and physical and mental fitness requirements applicable to the position of firefighter established by an agency authorized to establish these requirements on a Statewide basis, or comparable training and physical and mental fitness requirements as determined by the board of trustees. The term also shall include an administrative or supervisory employee of a firefighting unit whose duties include general or direct supervision of employees engaged in fire control and extinguishment activities or training responsibility for these employees, and a requirement for engagement in fire control and extinguishment activities if necessary.
"Firefighting unit" shall mean a paid municipal fire department, a fire district, or an agency of a county or the State which is responsible for the control and extinguishment of fires.
N.J.S. § 40A:14-19.1