STOP sign and GIVE WAY sign make no difference to whom they give way. "Stop" means stop and give way to other traffic according to law. "Give way" means either stop, or slow down and give way to other traffic according to law. I don't think there is a uniform law regarding this (left and right turn) all around the world. Even here in Victoria in Australia, right turn before left turn was the law when I get my licence in 1990. It was due to tram traffic in Melbourne. Even at that time all other states had it other way around. Sometime in early 90s, it change to left turn before right turn just to have a uniform law all over Australia.