Teams don't typically have to move from dugouts previously occupied...that's a pretty common rule. However, it's a tournament-specific rule. I've seen some instances where the rules said "move".
That said, while I don't think the side itself matters to the outcome, it is useful to have the HC on the same side as the dugout. Sometimes, decisions need to be made quickly, and when the HC is in a coaching box on the other side of the field, communication can be difficult.
That said, while I don't think the side itself matters to the outcome, it is useful to have the HC on the same side as the dugout. Sometimes, decisions need to be made quickly, and when the HC is in a coaching box on the other side of the field, communication can be difficult.