Cal. Health and Safety Code § 43803

For each vehicle identified by the state board as a low-emission motor vehicle, the Department of General Services, in consultation with the state board and the State Energy Resources Conservation and Development Commission, shall determine if the low-emission motor vehicle meets all of the following requirements: (a) The vehicle can be manufactured or obtained in sufficient numbers for the purpose of proper evaluation. (b) The vehicle meets the performance needs for state vehicles. (c) The cost of the vehicle does not exceed by more than 100 percent the average cost of comparable state vehicles purchased in the preceding fiscal year. (d) If the vehicle is purchased by the state, there would be a sufficient number of servicing and maintenance outlets. (e) The average operating and maintenance costs for the vehicle are comparable to the average operating and maintenance costs for all other state passenger vehicles. In no event, however, shall the average operating and maintenance costs for the vehicle exceed the average costs of operating and maintaining all other state vehicles by more than 50 percent.