Hvis der anvendes statisk skiltning til at angive de sikrede parkeringspladser, bør disse overholde Wienerkonventionen af 8. november 1968 i de tilfælde, hvor medlemsstater er part i denne.
If static signs are used to indicate safe and secure parking areas, these should comply with the Vienna Convention of 8 November 1968, where Member States are party to it.