Cal. Health and Safety Code § 44156

(a) In order to implement the program, the state board, in consultation with the bureau, the Department of Transportation, the Department of Motor Vehicles, the Department of the California Highway Patrol, other interested state agencies, and stakeholders as part of a public process, shall implement a pilot program that develops and demonstrates technologies that show potential for readily bringing vehicles into the program. The state board shall report the findings of the pilot program on its internet website. (b) No later than two years following the completion of the pilot program required pursuant to this section, and before adopting and implementing the program, the state board shall report to the transportation and environmental committees of the Legislature on the following: (1) A review of all investigated test procedures, hardware and software, and an assessment of which pathway was found to be the most cost effective, enforceable, and least burdensome for compliant truck operators, including, but not limited to, the estimated operational downtime associated with each test method. (2) A comprehensive enforcement strategy to ensure the fair application of the program. (3) A description of how the agency will harmonize the program with existing regulations to ensure stakeholders do not face duplicative requirements. (4) Steps the state board will take to ensure emission reductions attributed to this program will be accounted for and credited in planning and technical documents including, but not limited to, the state implementation plan, scoping plans, and emissions models.