Section 114.517 - ExemptionsThe provisions of § 114.512 of this title (relating to Control Requirements for Motor Vehicle Idling) do not apply to:
(1) a motor vehicle that has a gross vehicle weight rating of 14,000 pounds or less;(2) a motor vehicle that has a gross vehicle weight rating greater than 14,000 pounds and that is equipped with a 2008 or subsequent model year heavy-duty diesel engine or liquefied or compressed natural gas engine that has been certified by the United States Environmental Protection Agency or another state environmental agency to emit no more than 30 grams of nitrogen oxides emissions per hour when idling;(3) the primary propulsion engine of a motor vehicle being used to provide air conditioning or heating necessary for employee health or safety in an armored vehicle while the employee remains inside the vehicle to guard the contents or while the vehicle is being loaded or unloaded;(4) a motor vehicle forced to remain motionless because of traffic conditions over which the operator has no control;(5) a motor vehicle being used by the United States military, national guard, or reserve forces, or as an emergency or law enforcement motor vehicle;(6) the primary propulsion engine of a motor vehicle providing a power source necessary for mechanical operation, other than propulsion, and/or passenger compartment heating, or air conditioning;(7) the primary propulsion engine of a motor vehicle being operated for maintenance or diagnostic purposes;(8) the primary propulsion engine of a motor vehicle being operated solely to defrost a windshield;(9) the primary propulsion engine of a motor vehicle that is being used to supply heat or air conditioning necessary for passenger comfort and safety in vehicles intended for commercial or public passenger transportation, or passenger transit operations, in which case idling up to a maximum of 30 minutes is allowed;(10) the primary propulsion engine of a motor vehicle being used to provide air conditioning or heating necessary for employee health or safety while the employee is using the vehicle to perform an essential job function related to roadway construction or maintenance;(11) the primary propulsion engine of a motor vehicle being used as airport ground support equipment;(12) the owner of a motor vehicle rented or leased to a person that operates the vehicle and is not employed by the owner; or(13) a motor vehicle when idling is necessary to power a heater or air conditioner while a driver is using the vehicle's sleeper berth for a government-mandated rest period and is not within two miles of a facility offering external heating and air conditioning connections at a time when those connections are available.30 Tex. Admin. Code § 114.517
The provisions of this §114.517 adopted to be effective December 9, 2004, 29 TexReg 11355; amended to be effective May 17, 2006, 31 TexReg 3900; amended to be effective February 21, 2008, 33 TexReg 1345; amended to be effective August 11, 2011, 36 TexReg 4972; amended to be effective August 30, 2012, 37 TexReg 6619