(a) A diesel or nondiesel fueled heavy duty vehicle including a bus or truck is forced to remain motionless because of the traffic conditions over which the operator thereof has no control.

(b) Regulations adopted by Federal, State or local agencies having jurisdiction require the maintenance of a specific temperature for passenger comfort. The idling time specified in section 217-3.2 of this Subpart may be increased, but only to the extent necessary to comply with such regulations.

(c) A diesel or nondiesel fueled engine is being used to provide power for an auxiliary purpose, such as loading, discharging, mixing or processing cargo; controlling cargo temperature; construction; lumbering; oil or gas well servicing; farming; or when operation of the engine is required for the purpose of maintenance.

(d) Fire, police and public utility trucks or other vehicles are performing emergency services.

(e) Trucks owned or operated by persons engaged in mining and quarrying are used within the confines of such person's property.

(f) A diesel fueled truck is to remain motionless for a period exceeding two hours, and during which period the ambient temperature is continuously below 25°F.

(g) A heavy duty diesel vehicle, as defined in section 217-5.1(o) of this Part, that is queued for or is undergoing a State authorized periodic or roadside diesel emissions inspection pursuant to Subpart 217-5 of this Part.

(h) A hybrid electric vehicle, as defined in section 217-5.1(r) of this Part, idling for the purpose of providing energy for battery or other form of energy storage recharging.

(i) Heavy duty vehicles used for agricultural purposes on a farm.

(j) Electric powered vehicles.