It's tough to maintain. Better to just let players input rules for various casinos and store their own database. Even CBJN has casinos that only get updated every 3 to 5 years in the hinterlands. (Only the major casino markets get updated and only because Wong has paid reporters). In the hinterlands everyone is protecting their turf and isn't giving up any favorable rules changes until after they've had their chance to burn out the play or have gotten backed off.