ARSD 20:18:17:22. Software requirements for percentage payout

The slot machine must meet the following minimum theoretical percentage payouts during the expected lifetime of the slot machine: (1) The slot machine must pay out at least 80 percent. The theoretical payout percentage is determined using standard methods of probability theory; and (2) A slot machine must have a probability of 50,000,000-to-1 or better of obtaining the maximum posted payout on the machine. This rule does not apply to a theoretical winning amount that may be won as a result of playing a series of free games which was the result of a previous award.