Which two rules of the Belarusian Traffic Rules apply specifically at an intersection with circular movement signed 4.3?

1. Entry and exit must both be made from the extreme right lane in every case
2. The extreme-position requirement of item 63 does not apply on entry or exit, and item 57-1 dispenses with the turn signal on entry
3. Drivers must stop before entering even when no sign requires it
4. Lane changing on the roundabout is prohibited