CHAPTER VI
The Play 

PART III
IRREGULAR LEADS AND PLAYS

SECTION TWO
OTHER IRREGULAR LEADS AND PLAYS

LAW 58 - SIMULTANEOUS LEADS OR PLAYS 

A. Simultaneous Plays by Two Players

A lead or play made simultaneously with another player's legal lead or play is deemed to be subsequent to it.

B. Simultaneous Cards from One Hand

If a player leads or plays two or more cards simultaneously:

1. One Card Visible

If only one card is visible, that card is played; all other cards are picked up without penalty.

2. More Cards Visible

If more than one card is visible, the player designates the card he proposes to play; when he is a defender, each other card exposed becomes a penalty card (see Law 50).

3. After Visible Card Withdrawn

After a player withdraws a visible card, an opponent who subsequently played to that card may withdraw his play and substitute another without penalty (see Law 16C).

4. Error Not Discovered

If the simultaneous play remains undiscovered until both sides have played to the next trick, Law 67 applies.