>No State shall... pass any Bill of Attainder, ex post facto Law, or Law impairing the Obligation of Contracts, or grant any Title of Nobility. http://en.wikip

>No State shall... pass any Bill of Attainder, ex post facto Law, or Law impairing the Obligation of Contracts, or grant any Title of Nobility. http://en.wikipedia.org/wiki/Ex_post_facto_law#United_States http://en.wikipedia.org/wiki/Ex_post_facto_law#United_States This situation was instigated by a successful lawsuit against the FTB. I wonder if another one is on the way. According to this, however, courts have ruled that retroactive tax laws are not considered ex post facto.