The law is basically the same in Serbia and in Germany. The principal difference is in implementation – if you park your vehicle on a sidewalk or drive ruthlessly in a living street, it’s unlikely that you’ll get fined unless you get spotted by a policeman in a particularly bad mood, which we’re in a short supply. And that’s not something we can tag.
Whatever the practice, I would argue it should have been modeled as highway=residential; designation=living_street or similar, since it does not change the fact that it’s basically just a residential street. But that’s water under the bridge, and off-topic for this thread to boot. I only used it as an argument that a legally-sanctioned sign does not necessarily change the essence of the object in question (“essence” being a philosophical category).