Note that although North is responsible for moving the boards the laws don't actually say that North must do the moving. Instil in players an understanding that caution is needed if someone from the next table comes to get the boards. A board still in play could be sighted or results overheard.
It is good to encourage players to wait until the round is called before moving boards. Moving boards early can irritate others, cause UI and it has been known for slower tables to play a board from the newly arrived set.
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