(a) As used in this section, (1) “emergency vehicle” means a vehicle used by the Department of Motor Vehicles, Department of Emergency Services and Public Protection, Department of Energy and Environmental Protection, Department of Correction, Office of State Capitol Police, Department of Mental Health and Addiction Services, Department of Developmental Services, Department of Social Services, Department of Children and Families, Department of Transportation, Judicial Department, Board of Pardons and Paroles, Board of Regents for Higher Education, The University of Connecticut or The University of Connecticut Health Center for law enforcement or emergency response purposes, (2) “hybrid” means a passenger car that draws acceleration energy from two on-board sources of stored energy that consists of either an internal combustion or heat engine which uses combustible fuel and a rechargeable energy storage system and, for any passenger car or light duty truck with a model year of 2004 or newer, that is certified to meet or exceed the California Air Resources Board’s LEV (Low Emission Vehicle) II LEV Standard, (3) “zero-emission bus” means any urban bus certified by the executive officer of the California Air Resources Board to produce zero emissions of any criteria pollutant under all operational modes and conditions, (4) “battery electric vehicle” and “fuel cell electric vehicle” have the same meanings as provided in § 16-19eee, and (5) “camp trailer” has the same meaning as provided in § 14-1.

(b) The fleet average for cars or light duty trucks purchased by the state shall: (1) On and after October 1, 2001, have a United States Environmental Protection Agency estimated highway gasoline mileage rating of at least thirty-five miles per gallon and on and after January 1, 2003, have a United States Environmental Protection Agency estimated highway gasoline mileage rating of at least forty miles per gallon, (2) comply with the requirements set forth in 10 C.F.R. § part 490 concerning the percentage of alternative-fueled vehicles required in the state motor vehicle fleet, and (3) obtain the best achievable mileage per pound of carbon dioxide emitted in its class. The alternative-fueled vehicles purchased by the state to comply with said requirements shall be capable of operating on natural gas or electricity or any other system acceptable to the United States Department of Energy that operates on fuel that is available in the state.

(c) Notwithstanding any other provisions of this section, (1) on and after January 1, 2008: (A) At least fifty per cent of all cars and light duty trucks purchased or leased by the state shall be alternative-fueled, hybrid electric or plug-in electric vehicles, (B) all alternative-fueled vehicles purchased or leased by the state shall be certified to the California Air Resources Board’s Low Emission Vehicle II Ultra Low Emission Vehicle Standard, and (C) all gasoline-powered light duty and hybrid vehicles purchased or leased by the state shall, at a minimum, be certified to the California Air Resource Board’s Low Emission Vehicle II Ultra Low Emission Vehicle Standard, (2) on and after January 1, 2012, one hundred per cent of such cars and light duty trucks shall be alternative-fueled, hybrid electric or plug-in electric vehicles, (3) on and after January 1, 2026, at least fifty per cent of such cars and light duty trucks shall be battery electric vehicles, (4) on and after January 1, 2028, at least seventy-five per cent of such cars and light duty trucks shall be battery electric vehicles, and (5) on and after January 1, 2030, one hundred per cent of such cars and light duty trucks shall be battery electric vehicles.

(d) (1) On and after January 1, 2030, at least thirty per cent of all buses purchased or leased by the state shall be zero-emission buses.

(2) On and after January 1, 2024, the state shall cease to procure, purchase or lease any diesel-fueled transit bus.

(e) The provisions of subsections (b) to (d), inclusive, of this section shall not apply to any (1) emergency vehicle, (2) sport utility vehicle, (3) bus or van that transports individuals in wheelchairs, (4) specialty upfitted motor vehicle, or (5) camp trailer.

(f) In performing the requirements of this section, the Commissioners of Administrative Services, Energy and Environmental Protection and Transportation shall, whenever possible, consider the use of and impact on Connecticut-based companies.

(g) The Commissioner of Administrative Services, in consultation with the Commissioner of Transportation, shall (1) study the feasibility of creating a competitive bid process for the aggregate procurement of light, medium and heavy duty battery electric vehicles, fuel cell electric vehicles and zero-emission buses, (2) determine whether such aggregate procurement would achieve a cost savings on the purchase of such vehicles and buses and related administrative costs, (3) develop a plan to implement zero-emission buses state-wide, and (4) identify any barriers to such implementation. On or before January 1, 2024, the Commissioner of Administrative Services shall submit, in accordance with the provisions of § 11-4a, a report on the results of such study and a copy of the implementation plan to the joint standing committees of the General Assembly having cognizance of matters relating to government administration and transportation. The Commissioner of Administrative Services may proceed with such aggregate procurement if the commissioner determines such aggregate procurement would achieve a cost savings.

(h) The Commissioner of Administrative Services shall consider the lower costs associated with the maintenance of a battery electric vehicle when establishing the amount to lease such battery electric vehicle to another state agency.

(i) Not later than January 1, 2026, and annually thereafter, if the fleet average for cars or light duty trucks purchased by the state does not meet the requirements of subsection (c) of this section, the commissioner shall submit, in accordance with the provisions of § 11-4a, a report to the joint standing committees of the General Assembly having cognizance of matters relating to government administration, transportation and the environment. Such report shall (1) explain why such requirements were not met, and (2) propose an alternative schedule to meet such requirements after considering available appropriations and the market conditions for battery electric vehicles and the associated charging infrastructure for battery electric vehicles.