(1) Except for blackjack or a point count of 21 in 2 cards, a gaming operator may allow a player to double down by making an additional wager equal to the amount of his or her original wager, on the first 2 cards dealt to the player, or the first 2 cards of any split pair, on the condition that one and only one additional card shall be dealt to the hand on which he or she has elected to double down and in such circumstances, the one additional card shall be dealt face upwards and placed sideways on the layout of the blackjack table.
(2) If a dealer obtains blackjack after a player doubles down, the dealer shall only collect the amount of the original wager of such player and shall not collect the additional amount wagered in doubling down.