Trade Cards
If a player is dealt the 9♦, 10♠, or 2♥ face up, that player MUST trade that card with any other player’s up card from that street.
No Retrade
If a player trades one trade card for another, the second trade is then void. For example, if you trade the 9♦ for the 10♠, you can not trade the 10♠ with another card.