You can drop off any time after 6:30am and pick-up any time before 6pm. Not really a window as such. I've always assumed the number is just a deterrent - I've b

You can drop off any time after 6:30am and pick-up any time before 6pm. Not really a window as such. I've always assumed the number is just a deterrent - I've been late by a couple of minutes in the past and never noticed a fine. Though that might've been at the discretion of staff (e.g., to penalise lazy, repeat offenders rather than isolated case of traffic due to an accident).