You can find this by going to http://www.leginfo.ca.gov and searching the road and vehicle laws for "ZEV".
22511. (a) Any local authority, by ordinance or resolution, and any person in lawful possession of an offstreet parking facility may designate stalls or spaces in an offstreet parking facility owned or operated by that local authority or person for the exclusive purpose of fueling and parking a vehicle that displays a valid zero-emission vehicle (ZEV) decal identification posted on the driver's side rear window or bumper of the vehicle or, notwithstanding any other provision of law, if the vehicle does not have a rear window or bumper, on the driver's side of the windshield issued by the Department of Motor Vehicles pursuant to this section. The designation shall be made by posting a sign in compliance with subdivision
(d) or (e).
(b) If posted in accordance with subdivision (d) or (e), the owner or person in lawful possession of a privately owned or operated offstreet parking facility, after notifying the police or sheriff's department, may cause the removal of a vehicle from a stall or space designated pursuant to subdivision (a) in the facility to the nearest public garage if a valid ZEV decal identification issued pursuant to this section is not displayed on the vehicle.
(c) If posted in accordance with subdivision (d), the local authority owning or operating an offstreet parking facility, after notifying the police or sheriff's department, may cause the removal of a vehicle from a stall or space designated pursuant to subdivision (a) in the facility to the nearest garage, as defined in Section 340, that is owned, leased, or approved for use by a public agency if a valid ZEV decal identification issued pursuant to this section is not displayed on the vehicle.
(d) The posting required for an offstreet parking facility owned or operated either privately or by a local authority shall consist of a sign not less than 17 by 22 inches in size with lettering not less than one inch in height which clearly and conspicuously states the following:
"Unauthorized vehicles not displaying valid zero-emission vehicle decal identifications will be towed away at owner's expense. Towed vehicles may be reclaimed at ____________________________________ or by telephoning
(Telephone number of local law enforcement agency) The sign shall be posted in either of the following locations: (1) Immediately adjacent to, and visible from, the stall or space. (2) In a conspicuous place at each entrance to the offstreet parking facility.
(e) If the parking facility is privately owned and public parking is prohibited by the posting of a sign meeting the requirements of paragraph
(1) of subdivision (a) of Section 22658, the requirements of subdivision
(b) may be met by the posting of a sign immediately adjacent to, and visible from, each stall or space indicating that a vehicle not meeting the requirements of subdivision (a) will be removed at the owner's expense and containing the telephone number of the local traffic law enforcement agency.
(f) (1) For purposes of implementing this section, the Department of Motor Vehicles shall make available for issuance, beginning July 1, 2003, for a fee determined by the Department of Motor Vehicles to be sufficient to reimburse it for actual costs incurred pursuant to this section, distinctive decals for zero-emission vehicles. (2) The department shall design the decal, which shall be two inches by two inches, and be placed on the driver's side rear window or bumper of the vehicle, or, notwithstanding any other provision of law, if the vehicle does not have a rear window or bumper, on the driver's side of the windshield. Each decal shall display a unique number. The decal may be provided to car dealers who sell electric vehicles for distribution to ZEV purchasers.
(g) For purposes of this section, "zero-emission vehicle" means any car, truck, or any other vehicle that produces no tailpipe or evaporative emissions.
(h) Nothing in this section is intended to interfere with existing law governing the ability of local authorities to adopt ordinances related to parking programs within their jurisdiction, such as programs that provide free parking in metered areas or municipal garages for electric vehicles.
22511.1. (a) A person may not park or leave standing any vehicle in a stall or space designated pursuant to Section 22511 unless a valid zero-emission vehicle decal identification issued pursuant to Section 22511 is displayed on that vehicle. (b) A person may not obstruct, block, or otherwise bar access to parking stalls or spaces described in subdivision (a) except as provided in subdivision (a). (c) A person shall not display a decal issued pursuant to Section 22511 on a vehicle that does not use electricity as the motive power.