Variable Jackpots Banned Date

[aristomatic]

Well, I recently asked this within a different thread but I think it needs to be moved to its own thread as the other thread is taking a different direction...
I just need a definitive date please:- The year variable jackpot machines were banned under Nevada gaming law, e.g. when operators had to remove jackpots filled from the top of the coin tube so the punter always received the same jackpot amount regardless of quick succession jackpots occurring. So jackpots were either attendant paid or via fixed hand-loaded jackpot.

Thanks in advance.