What's the process for filing an 11b? Do I file it as soon as a court date is issued? What is the amount of time needed for 11b to apply?

Is there any grace time on parking tickets in the city of Toronto? I go a parking ticket on the 26th that I am wondering if I should fight. I parked on Richmond street downtown and paid until 4pm (at which time it is no parking). I thought I was about 5 mins late getting back to my car, by my watch ...