Said Court shall treat such signed statements, if accepted and accompanied by the penalty herein prescribed, as a plea of guilty, and shall make such entry on its records. No costs, fees, or further charges shall be assessed against any person so admitting a violation of any parking or traffic rule, regulation, or ordinance, or shall be allowed or paid to any officer or person because of such violation, but such penalty shall be accepted by said Court in full discharge of the criminal liability of such person caused by such violation. Said Court shall retain all such signed statements for a period of two years from the date thereof, and shall keep a separate record, available to the public at any reasonable time, of all money collected and all other official acts done in connection therewith.