S-13.1, r. 3 - By-law respecting casino games

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67.47. After viewing the 3 cards, each player having made a bet on the 7-card hand may withdraw from the game only for that bet, before the dealer shows 2 of his 4 cards. In such a case, the player forfeits half of the bet for the 7-card hand.
O.C. 1033-2007, s. 3.