(a) Except when done at the direction of a law enforcement officer or an official traffic control device, no person shall operate, attempt to operate, stop, stand, park, occupy or ride upon or within any vehicle within the boundaries of any public or private parking lot during the hours that such parking lot is closed to the public.

(b) For purposes of this section, a parking lot is closed to the public during specified hours if notice of same is prominently posted at every entrance to the parking lot in a manner likely to come to the attention of motorists entering or attempting to enter the parking lot. Permanently lettered, clearly legible signs bearing the following legend shall be deemed to be sufficient notice:

THIS LOT IS CLOSED TO THE PUBLIC BETWEEN THE HOURS OF ________ AND ________. ORDINANCES OF THE CITY OF TOPEKA ENFORCED ON THIS PROPERTY.

(c) It shall be a defense to a violation of this section if the person charged had actual authority to be upon the parking lot during the posted hours. (Code 1981 § 43-360. Code 1995 § 142-302.)