D.C. Mun. Regs. tit. 30, § 2204
2204.1 A GOS Machine is a mechanical or electronic gaming device that rewards the winning player or players with cash, a gift card, or a redeemable Voucher for cash or cash equivalents.
2204.2 A mechanical or electronic gaming device shall not be considered a GOS Machine if:
(a) The ability of a player to succeed at the game is impacted by the number or ratio of prior wins to prior losses of players playing the game;
(b) The outcome of the game can be controlled by a source other than a player playing the game;
(c) The success of a player is or may be determined by a chance event that cannot be altered by the player's actions;
(d) The ability of a player to succeed at the game is impacted by game features not visible or known to a reasonable player; or
(e) The ability of a player to succeed at the game is impacted by the exercise of skill that no reasonable player could exercise.
SOURCE: Final Rulemaking published at 36 DCR 6681, 6718 (September 22, 1989); as amended by Final Rulemaking published at 66 DCR 11598 (August 30, 2019); as amended by Final Rulemaking published at 68 DCR 3289 (March 26, 2021).