No person shall park any vehicle in any parking meter space, except as otherwise permitted by this Article, without immediately depositing in the parking meter adjacent to such space such lawful coins of the United States as are required by such meter and as designated by directions on the meter, and when required by the directions on the meter, setting in operation the timing mechanism thereof in accordance with such directions, unless such parking meter indicates at the time such vehicle is parked that an unexpired portion remains of the period for which a coin has been previously deposited.