29 C.F.R. § 553.210

(a) As used in sections 7(k) and 13(b)(20) of the Act, the term “any employee * * * in fire protection activities” refers to “an employee, including a firefighter, paramedic, emergency medical technician, rescue worker, ambulance personnel, or hazardous materials worker, who—(1) is trained in fire suppression, has the legal authority and responsibility to engage in fire suppression, and is employed by a fire department of a municipality, county, fire district, or State; and (2) is engaged in the prevention, control, and extinguishment of fires or response to emergency situations where life, property, or the environment is at risk.”

(b) Not included in the term “employee in fire protection activities” are the so-called “civilian” employees of a fire department, fire district, or forestry service who engage in such support activities as those performed by dispatchers, alarm operators, apparatus and equipment repair and maintenance workers, camp cooks, clerks, stenographers, etc.