(a) Not later than September 30, 2010, a state agency that operates a fleet of more than 15 motor vehicles, excluding law enforcement and emergency vehicles, shall have a fleet consisting of vehicles of which at least 50 percent use compressed natural gas, liquefied natural gas, liquefied petroleum gas, methanol or methanol/gasoline blends of 85 percent or greater, ethanol or ethanol/gasoline blends of 85 percent or greater, biodiesel or biodiesel/diesel blends of 20 percent or greater, or electricity, including electricity to power a plug-in hybrid motor vehicle.
(b) The Texas Commission on Environmental Quality shall collect reasonable information needed to determine the air quality benefits from use of compressed natural gas, liquefied natural gas, liquefied petroleum gas, methanol or methanol/gasoline blends of 85 percent or greater, ethanol or ethanol/gasoline blends of 85 percent or greater, biodiesel or biodiesel/diesel blends of 20 percent or greater, or electricity, including electricity to power a plug-in hybrid motor vehicle, at affected agencies.

(c) A state agency in its annual financial report to the legislature shall report its progress in achieving the percentage requirements of this section by:
(1) itemizing purchases, leases, and conversions of motor vehicles;
(2) itemizing usage of compressed natural gas, liquefied natural gas, liquefied petroleum gas, methanol or methanol/gasoline blends of 85 percent or greater, ethanol or ethanol/gasoline blends of 85 percent or greater, biodiesel or biodiesel/diesel blends of 20 percent or greater, or electricity, including electricity to power a plug-in hybrid motor vehicle;
(3) describing the availability of compressed natural gas, liquefied natural gas, liquefied petroleum gas, methanol or methanol/gasoline blends of 85 percent or greater, ethanol or ethanol/gasoline blends of 85 percent or greater, biodiesel or biodiesel/diesel blends of 20 percent or greater, or electricity, including electricity to power a plug-in hybrid motor vehicle; and
(4) providing the information reasonably needed to determine the air quality benefits from use of compressed natural gas, liquefied natural gas, liquefied petroleum gas, methanol or methanol/gasoline blends of 85 percent or greater, ethanol or ethanol/gasoline blends of 85 percent or greater, biodiesel or biodiesel/diesel blends of 20 percent or greater, or electricity, including electricity to power a plug-in hybrid motor vehicle.
(d) A state agency may meet the percentage requirements of this section through purchase of new vehicles or the conversion of existing vehicles, in accordance with federal and state requirements and applicable safety laws. The Texas State Technical College System shall develop a program and provide training to a state agency converting an existing vehicle to meet the requirements of this section.
(e) The comptroller may reduce a percentage specified by this section or waive the requirements of this section for a state agency on receipt of certification supported by evidence acceptable to the comptroller that:
(1) the agency’s vehicles will be operating primarily in an area in which neither the agency nor a supplier has or can reasonably be expected to establish adequate refueling for compressed natural gas, liquefied natural gas, liquefied petroleum gas, methanol or methanol/gasoline blends of 85 percent or greater, ethanol or ethanol/gasoline blends of 85 percent or greater, biodiesel or biodiesel/diesel blends of 20 percent or greater, or electricity, including electricity to power a plug-in hybrid motor vehicle; or
(2) the agency is unable to obtain equipment or refueling facilities necessary to operate vehicles using compressed natural gas, liquefied natural gas, liquefied petroleum gas, methanol or methanol/gasoline blends of 85 percent or greater, ethanol or ethanol/gasoline blends of 85 percent or greater, biodiesel or biodiesel/diesel blends of 20 percent or greater, or electricity, including electricity to power a plug-in hybrid motor vehicle, at a projected cost that is reasonably expected to be no greater than the net costs of continued use of conventional gasoline or diesel fuels, measured over the expected useful life of the equipment or facilities supplied.