On the rules under freebuild, it says that redstone isn't allowed. However, it says nothing about it for the other worlds. I was going to build some redstone in the main world or my void world, but some other players believed that redstone was not allowed in any world. I didn't want to get banned or warned about this without checking first.
So please, could you tell me if it is allowed or not in the worlds other than freebuild?