20:18:15:10The shuffle and reshuffle.

After the players inspect the cards, the cards must be turned face downward on the table, mixed thoroughly, and stacked. After each stack of cards is dealt, the dealer must reshuffle the cards so that they are randomly intermixed. A reshuffle of the cards must take place after the cutting card is reached and before the dealer deals all of the cards. The retail licensee may reshuffle the cards at its discretion.

Source: 16 SDR 57, effective October 1, 1989; 19 SDR 177, effective May 27, 1993.