GENERAL RULES.
90. A trick turned and quitted may not be looked at (except under Law 82) until the end of the play. The penalty for the violation of this law is 25 points in the adverse honour score.
91. Any player during the play of a trick or after the four cards are played, and before the trick is turned and quitted, may demand that the cards be placed before their respective players.
92. When an adversary of the declarer, before his partner plays, calls attention to the trick, either by saying it is his, or, without being requested to do so, by naming his card or drawing it toward 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. An adversary of the declarer 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, he make any unauthorized reference to any incident of the play, the declarer may call a suit from the adversary whose next turn it is 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.
95. Unless a pack be imperfect, no player has the right to call for one new pack. When fresh cards are demanded, two packs must be furnished. When they are produced during a rubber, the adversaries of the player demanding them have the choice of the new cards. If it be the beginning of a new rubber, the dealer, whether he or one of his adversaries call for the new cards, has the choice. New cards cannot be substituted after the pack has been cut for a new deal.
96. A card or cards torn or marked must be replaced by agreement or new cards furnished.