Wrong.
Casinos can chose what you can double on.
Stanleys were the last casino chain to allow double on any two, for a whole year they only let you double on 9,10,11, not soft doubles.
Some casinos only allow you to split tens of the same value, i.e. JJ, TT, QQ, KK, Stanleys allow you to split any tens, i.e. JK, QT etc.
Loads of heat at Palm Beach, my advice stay away.
The Empire or Golden Nugget has a much better game.