If, without waiting for his partner to play, either of the dealer's adversaries should play on the table the best card, or lead one which is a winning card, as against the dealer and dummy, or should continue (without waiting for his partner to play) to lead several such cards, the dealer may demand that the partner of the player in fault win, if he can, the first, or any other of these tricks, and the other cards thus improperly played are exposed cards.
If either or both of the dealer's adversaries throw his or their cards on the table face upwards, such cards are exposed and are liable to be called; but if either adversary retain his hand he cannot be forced to abandon it. If, however, the dealer should say, "I have the rest," or any other words indicating that the remaining tricks are his, the adversaries of the dealer are not liable to have any of their cards called should they expose them, believing the dealer's claim to be true, should it subsequently prove false.
If a player who has rendered himself liable to have the highest or lowest of a suit called fail to play as directed, or if, when called on to lead one suit, lead another, having in his hand one or more cards of the suit demanded, or, if called upon to win or lose a trick, fail to do so when he can, he is liable to the penalty for revoke, unless such play be corrected before the trick is turned and quitted.
LEADS OUT OF TURN
If either of the dealer's adversaries lead out of turn, the dealer may call the card erroneously led, or may call a suit when it is the turn of either adversary to lead.
If the dealer lead out of turn, either from his own hand or dummy, he incurs no penalty; but he may not rectify the error after the second hand has played.