✨ Gaming Machine Technical Requirements
8 APRIL NEW ZEALAND GAZETTE 903
3.14.2 The game software must not determine the outcome of a play (critical to the game result) or gamble until after all player options pertaining to the play or gamble have been made.
Fundamental RNG Requirement
3.14.3 The fundamental requirement is that the use of an RNG results in the selection of game symbols or production of game outcomes or selection of "mystery" jackpot values which are able to be proven to:
a) be statistically independent;
b) be uniformly distributed over their range;
c) pass various recognised statistical tests; and
d) be unpredictable.
3.14.4 RNG tests that may be applied include:
a) chi-square test;
b) equi-distribution (frequency) test;
c) gap test;
d) poker test;
e) coupon collector’s test;
f) permutation test;
g) run test (Patterns of occurrences should not be recurrent);
h) spectral test;
i) serial correlation test potency and degree of serial correlation (outcomes should be independent from the previous game); and
j) test on subsequences.
Choice of Algorithm
3.14.5 The choice of algorithm is at the discretion of the supplier of equipment, however, it must comply with the requirements of this document.
Background RNG Activity Requirement
3.14.6 The RNG must be cycled continuously between plays.
RNG Seeding
3.14.7 The method of seed-set generation must be approved.
3.14.8 The method of seed generation must ensure that:
a) the same sequence of random numbers is never used in more than one device at the same time (i.e. there is to be a method whereby each gaming machine can have a unique seed generation technique or RNG startup values).
b) the "next" game outcome is not able to be predicted.
3.14.9 Seeding and re-seeding must be kept to an absolute minimum. Both the method of re-seeding and the instances when it may occur must be approved. Re-seeding should not in general be under operator control. Re-seeding should not be a routine or regular practice.
3.14.10 If for any reason the background RNG activity is interrupted (e.g. gaming machine power down), the next input variable(s) for the RNG must be a function of the value(s) produced by the RNG immediately prior to interruption.
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Online Sources for this page:
VUW Te Waharoa —
NZ Gazette 2002, No 32
Gazette.govt.nz —
NZ Gazette 2002, No 32
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Gaming Machine Display and Functional Requirements
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