Amend CSHB 1540 as follows:                                                  
	(b)  The commission may not prohibit or limit the idling of a 
motor vehicle, except where prohibited by state or federal law or 
regulations in non-attainment areas, 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.