A local authority car park.
"Terms and Conditions: Customers Must: Display a valid ticket in windscreen or side window of vehicle. Mark within marked bays.
If you vehicle is found to be in contravention, you are liable to receive a penalty notice. If contravention is More Serious, then the penalty charge will be higher than if the contravention is less serious."
Some fascinating hints at bureaucracy here.
Firstly, for parking contravention....the whole idea of more serious and less serious parking contraventions is fascinating especially as there are no clues to that, other than the instructions to display a ticket, in windscreen or side window, and to park within marked bays. A parking contravention is really just that. In the grand scene of things the idea of a "serious" parking convention is curious, at worst probably parking across multiple bays, maybe parking a helicopter and taking up multiple bays.
Secondly, even when there's no parking charge, there's still a need for a ticket, and with some extra instructions too. That applies evenings and the whole of the weekend. So no revenue during those periods, but still incurring the cost of using a machine and producing tickets.....