The California Air Resources Board proposed to adopt Cal. Code Regs. tit. 17, §§95690.1 to 95690.7. The proposed adoption would require public and private airport shuttle fleets to transition from internal combustion vehicles to zero emission vehicles. A hearing will be held February 21, 2019, and comments are due that same date. See https://oal.ca.gov/wp-content/uploads/sites/166/2019/01/1z-2019.pdf (pp. 24-35).