a. 
No person shall drive or park a motor vehicle upon land or premises where the owner or the person occupying or having possession, or the agents thereof, have posted on such property or premises a notice in substantially the following form, and where the permission therein referred to shall not have been granted:
1. 
A statement that parking is restricted and to whom it applies:
Examples:
"Parking for XXX customers only";
"This space reserved for XXX";
"Parking for tenants only";
"No parking in this area";
"Parking by permit holders only";
2. 
A statement that violators may or will be cited:
Examples:
"Violators will be cited by Walnut Creek Police";
"Unauthorized vehicles will be cited or towed at owner's expense";
3. 
A reference to this Municipal Code section:
Examples:
"Sec. 4-6.301 Walnut Creek Muni. Code";
"Section 4-6.301 W.C.M.C."
Lettering shall be on a contrasting background and of such size and so placed as to be reasonably visible to all persons entering the private parking area. If the parking area is shared by more than one business or firm, those stalls for the private use by each shall be clearly identified.
Nothing in this section shall be construed as placing a requirement upon the Police Department to patrol such private property for violations and no enforcement action shall be taken except upon specific request by an authorized agent, owner or person in lawful possession or control thereof.
b. 
Where parking meters are used, signs on the parking meters that are consistent with the signs on the parking meters placed on the public streets or public parking lots shall be deemed to meet the requirements of subsection (a).
(5420, as amended by § 1, Ord. 1270, eff. April 7, 1976, and by § 1, Ord. 1965, eff 8/10/2000)
No person, without permission of the owner or person entitled to the possession thereof, shall park any motor vehicle in or upon any private property so as to interfere with the use thereof.
(5421)
It is unlawful for any person to operate, drive or leave any vehicle in, over or upon any private property without the express or implied permission of the owner thereof, the person entitled to the possession thereof for the time being, or the authorized agent of either. The provisions of this section shall not apply to public or private parking lots.
(5422)
Any regularly employed and salaried officer of the police department, the owner of any private property, the person entitled to the possession thereof for the time being, or the authorized agent of either may remove or cause to be removed any vehicle parked or left standing on any private property in violation of the provisions of §4-6.303 of this article.
(5423, as amended by § 1, Ord. 1143, eff. August 30, 1972)
If a vehicle removed from such private property was rightfully there, the person who complained of the presence of such vehicle and/or the person (other than the employees of the Police Department) who caused such vehicle to be removed shall be liable for any and all charges for towing and for caring for and keeping safe such vehicle.
(5424, as amended by § 1, Ord. 1143, eff. August 30, 1972)
Any person referred to in Section 4-6.304 of this article who removes any vehicle from any private property in the City is hereby authorized to remove such vehicle to the nearest garage or other place of safety or to a garage designated or maintained by the City.
(5425)
The keeper of any garage in which any vehicle is stored in accordance with the provisions of this article shall have a lien thereon for his compensation for towing and for caring for and keeping safe such vehicle and may satisfy such lien upon compliance with and under the conditions stated in the Vehicle Code of the State.
(5427)
Any person, including any tow truck operator or driver, as defined under the provisions of this article, who removes or causes to be removed a vehicle, shall notify the Police Department of the location from which the vehicle was towed, the vehicle license number and description and the place of storage within two (2) hours of removal.
(§ 1, Ord. 1212, eff. May 29, 1974)
Any person, as defined under the provisions of this article, who removes or causes to be removed a vehicle shall keep appropriate records of the removal, including the name, address and telephone number of the person authorizing the removal from private property.
(§ 1, Ord. 1212, eff. May 29, 1974)