http://gaming.nv.gov/stats_regs/reg14.pdf
14.040 Minimum standards for gaming devices. All gaming devices
submitted for approval:
1. Must theoretically pay out a mathematically demonstrable percentage
of all amounts
wagered, which must not be less than 75 percent for each wager
available for play on the device.
(a) Gaming devices that may be affected by player skill must meet this
standard when using a
method of play that will provide the greatest return to the player
over a period of continuous play.
(b) The chairman may waive the 75 percent standard if the manufacturer
can show to the
chairman's satisfaction that this requirement inhibits design of
the
device or is inappropriate
under the circumstances, the device theoretically pays out at least 75
percent of all wagers made
when all wagers are played equally, and the device otherwise meets the
standards of
subsections 2 through 6. A waiver will be effective when the
manufacturer receives written
notification from the chairman that this standard will be waived
pursuant to this paragraph. A
waiver of this standard pursuant to this paragraph is not an approval
of the device.
2. Must use a random selection process to determine the game outcome
of each play of a
game. The random selection process must meet 95 percent confidence
limits using a standard
chi-squared test for goodness of fit.
(a) Each possible permutation or combination of game elements which
produce winning or
losing game outcomes must be available for random selection at the
initiation of each play.
(b) For gaming devices that are representative of live gambling games,
the mathematical
probability of a symbol or other element appearing in a game outcome
must be equal to the
mathematical probability of that symbol or element occurring in the
live gambling game. For other
gaming devices, the mathematical probability of a symbol appearing in
a position in any game
outcome must be constant.
(c) The selection process must not produce detectable patterns of game
elements or
detectable dependency upon any previous game outcome, the amount
wagered, or upon the
style or method of play.
3. Must display an accurate representation of the game outcome. After
selection of the game
outcome, the gaming device must not make a variable secondary decision
which affects the
result shown to the player.
4. Must display the rules of play and payoff schedule.
5. Must not automatically alter paytables or any function of the
device based on internal
computation of the hold percentage.
6. Must meet the technical standards adopted pursuant to section
14.050.
7. Except for devices granted a waiver pursuant to subsections 1(b),
or 8, each gaming device
exposed for play in the State of Nevada by any gaming licensee,
including an operator of a slot
machine route, must meet the standards and requirements set forth
within subsection 1, as
though the gaming device had been submitted for approval subsequent to
September 28, 1989.
8. The chairman of the board or his designee may waive the
requirements of subsection 7 for
a licensee exposing a gaming device to the public for play, if the
licensee can demonstrate to the
chairman's satisfaction that:
(a) After the waiver the aggregate theoretical payout for all amounts
wagered on all gaming
devices exposed for play by the licensee at a single establishment
meets the 75 percent standard
of subsection 1, and
(b) The licensee is unable to bring the device into compliance with
the requirements of
subsection 1, because of excessive cost or the unavailability of
parts.
(Adopted: 7/89. Amended: 9/89; 10/92. Effective: 1/1/93.)