Agreement is established when a side assents to an opponent’s claim or concession, and raises no objection to it before making a call on a subsequent board or before the round ends, whichever occurs first. The board is scored as though the tricks claimed or conceded had been won or lost in play.
Agreement with a claim or concession (see A) may be withdrawn within the Correction Period established under Law 79C:
The board is rescored with such trick awarded to his side.