Are any special signs needed to charge a control fee?

It does. Inspection fees may only be charged if parking bans or parking conditions have been clearly communicated by signs in the area. The law is clear, signs must meet road marking standards. Simple plastic signs and the like are not permitted.

Generally speaking, there are two basic scenarios regarding the signage surrounding the issuance of a control fee. In one case, the intention is to generally prohibit parking in an area apart from a few possible exceptions who may park there. In the second case, it concerns an area which is to be considered as a parking space, but where a parking fine can be issued when unauthorised persons have parked or not paid the parking fee.