"if the spot has been taken, or if a car is parked in the wrong spot, the police is summoned to make a contravention for wrong parking (300 QR and 3 points deducted)"

They wouldn't do that, it's not "wrong parking" to the police, it's somebody parked neatly in a parking spot. The police doesn't care about CC assigning spots and people parking in another one.

They don't even care about disabled parking, I usually see cars in the disabled spots (close to 2 entrances) that don't have the disabled badge, and cars with the badge waiting for one of the cars to get out of their parking space.