1) You have 5 minutes after parking your car to walk to a muni-meter, purchase time, return to your car, and display the paid receipt on your dashboard. This is called the 5-minute grace period. 2) You also have a 5-minute grace period after your purchased time expires to move your car before receiving a parking ticket. 3) If you receive a parking ticket but have a valid muni-meter receipt showing payment within 5 minutes of the ticket time, this is an affirmative defense that can get the ticket dismissed. 4) You can transfer any unused muni-meter time to another parking space as long as the rates are the same or lower and you do not