87. At the end of a hand the claimants of a revoke may search all the tricks. If the cards have been mixed the claim may be urged and proved if possible; but no proof is necessary and the claim is established if, after it has been made, the accused player or his partner mix the cards before they have been sufficiently examined by the adversaries.
88. A revoke must be claimed before the cards have been cut for the following deal.
89. Should both sides revoke, the only score permitted shall be for honors in trumps or chicane. If one side revoke more than once, the penalty of 100 points for each extra revoke shall then be scored by the other side.
GENERAL RULES
90. Once a trick is complete, turned and quitted, it must not be looked at (except under Law 82) until the end of the hand.
91. Any player during the play of a trick or after the four cards are played, and before they are touched for the purpose of gathering them together, may demand that the cards be placed before their respective players.
92. If either of the declarer's adversaries, prior to his partner playing, call attention to the trick, either by saying it is his, or without being requested so to do, by naming his card or drawing it towards him, the declarer may require such partner to play his highest or lowest card of the suit led, or to win or lose the trick.
93. Either of the declarer's adversaries may call his partner's attention to the fact that he is about to play or lead out of turn; but if, during the play of a hand, he make any unauthorized reference to any incident of the play, or of any bid previously made, the declarer may call a suit from the adversary whose turn it is next to lead.
94. In all cases where a penalty has been incurred the offender is bound to give reasonable time for the decision of his adversaries.
NEW CARDS