§ 7-21. Unlawful parking.

No person may permit a vehicle to park or remain in any space adjacent to a single-space parking meter that is in active operation or in any space in an area controlled by a multi-space parking meter that is in active operation:

(1) beyond the period during which vehicles are permitted to park or remain in that space;

(2) in any manner except as specified in this subtitle;

(3) except as otherwise specifically provided in this subtitle, without paying the applicable fee; or

(4) except as otherwise specifically provided in this subtitle, without displaying a multi-space parking receipt when and in the manner required by this subtitle..