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Effective date: 28 February 2012
Last amended: 2 August 2019
Next review: August 2025


This policy is designed to provide information in regard to the subject matter covered, and with the understanding that the Gaming and Wagering Commission is not passing legal opinion or interpretation or other professional advice. The information is provided on the understanding that all persons undertake responsibility for assessing the relevance and accuracy of its contents.


The Gaming and Wagering Commission of Western Australia (the commission) has adopted technical standards for Electronic Gaming Machines (EGMs) as set out in the Gaming Machine National Standard. 

The Western Australian Appendix to the Gaming Machine National Standard describes the specific jurisdictional technical and policy requirements which are in addition to, or differ from, those specified by the Gaming Machine National Standard.

All EGM’s in use at Crown Perth are tested and certified by an accredited testing facility (ATF) to have a minimum return to player percentage of 90%.

Legislative basis

The commission is responsible for the regulation of gaming machines in Western Australia as provided for in the:

  • Casino Control Act 1984; and
  • Gaming and Wagering Commission Act 1987.


All games must be certified by an ATF to provide a minimum return to player of at least 90%. The return to player can include contributions from the base game and any associated jackpot feature.

The commission may, at its discretion, require additional information and testing in relation to any game that fails to meet the theoretical return to player in any reporting period or for any other reason.

All EGM’s are subject to on-going performance audits. Performance audits of an individual game type are conducted each month with overall RTP performance for all game types reported on a biannual basis for periods ending December and June.

Where a game type does not perform as expected officers of the commission will investigate the reasons for the unexpected performance and report all findings to the commission. Where a game has displayed unexpected and/or unexplained performance the commission may take whatever action it considers appropriate.

Gaming and Wagering Commission of Western Australia

Page reviewed 11 September 2023