(a) A gaming device shall have a light, located conspicuously on the top of such device, that illuminates automatically when:
(1) a player has won an amount or is collecting credits that the device cannot pay automatically;
(2) an error condition (including door open) has occurred; or
(3) a player initiates a call attendant.
(b) For devices such as bar-top games, it is permissible for the tower light to be shared among other gaming devices or to be substituted by an audible alarm.
(c) The commission may approve, on a case-by-case basis, alternative means to alert appropriate personnel in regard to the operation of a gaming device.