§ 10.308 MOTOR VEHICLES UPON PRIVATE PROPERTY.
   (A)   Any person, firm or corporation may prohibit the operation of motor vehicles upon its real property. The owner of the real property or his designated agent shall post signs on the said property in a fashion reasonably calculated to give notice to those sought to be so prohibited. Such signs shall state “NO MOTOR VEHICLES ALLOWED UPON PROPERTY, EXCEPT WITH PERMISSION OF OWNER” and shall conform to the following criteria:
      (1)   The lettering on the sign shall be no less than two inches in height for each letter;
      (2)   The lettering shall be red placed on a white sign;
      (3)   The lower edge of the sign shall be no less than six feet in height nor higher than eight feet from the level of the ground immediately below the said sign; and
      (4)   The sign shall conform in all other respects to the Manual on Uniform Traffic Control Devices for streets and highways of the State of Minnesota.
   (B)   Whenever a Columbia Heights police officer finds a motor vehicle upon such private property posted in accordance with this section, such officer may move such vehicle or require the driver or other person in charge of the vehicle to remove the same to a position off the private property, all at the owner's expense. The placement of signs in accordance with division (A) by any person, firm, or corporation shall be construed as granting to any Columbia Heights police officer the right of entry upon said real estate for the purpose of the enforcement of this chapter.
   (C)   No person, firm or corporation which is the owner of any motor vehicle and no person who is in actual physical control of any motor vehicle shall allow or permit the same to be driven, operated, parked, abandoned or actually physically controlled when the same is upon such posted property without the permission of the owner.
(`77 Code, § 10.308) Penalty, see § 10.401