S.D. Admin. R. 20:18:17:21

Current through Register Vol. 50, page 159, June 17, 2024

Section 20:18:17:21 - Software requirements for randomness testing

A slot machine must have a random number generator. A selection process is considered random if the following specifications are met:

(1) A reel satisfies at least 98 percent confidence level using the standard chi-squared analysis. Chi-squared analysis is the sum of the squares of the difference between the expected result and the observed result. A reel is a physical or animated strip with symbols attached that rotates and stops;

(2) A reel stop position does not produce a statistic with regard to producing patterns of occurrences. Each reel position is considered random if it meets at least the 98 percent confidence level with regard to the runs test or any similar pattern testing statistic. The runs test is a mathematical statistic that determines the existence of recurring patterns within a set of data;

(3) A reel position is independently chosen without regard to any other symbol produced during that play. This test is the correlation test. Each pair of reels is considered random if they meet at least the 98 percent confidence level using standard correlation analysis;

(4) Each reel position is independently chosen without reference to the same reel stop position in the previous game. This test is the serial correlation test. A reel stop position is considered random if it meets at least the 98 percent confidence level using standard serial correlation analysis;

(5) The random number generator and random selection process must be impervious to influences from outside the slot machine, including electromagnetic interference, electrostatic interference, and radio frequency interference. A slot machine must use appropriate communication protocols to protect the random number generator and random selection process from influence by associated equipment which is conducting data communications with the slot machine;

(6) If a slot machine uses more than one similar physical or video component to portray either motion or a random selection process, the symbols on each separate component are selected independently and randomly.

S.D. Admin. R. 20:18:17:21

16 SDR 57, effective 10/1/1989; 22 SDR 189, effective 7/11/1996.

General Authority: SDCL 42-7B-7, 42-7B-11.

Law Implemented: SDCL 42-7B-2.1, 42-7B-3, 42-7B-4, 42-7B-7, 42-7B-17, 42-7B-43.