Every casino jurisdiction is different, (and in the US, many native American casinos are regulated by a gaming authority that is part of the same tribal nation,

Every casino jurisdiction is different, (and in the US, many native American casinos are regulated by a gaming authority that is part of the same tribal nation, so it is a bit circular) but almost all require a thorough review of any new game's rules and equipment, and usually also require third-party certification of the game's theoretical odds.