That has nothing to do with regulating the initial distribution of a digital currency. Evan was fully within his rights to determine how Dash would be distributed, and furthermore, make changes in the future. He could have premined it 100% and sold the coins for $1000 a piece, and it still wouldn't be illegal. It's obvious that you're grasping at straws.
Having an unregistered IPO in the USA is Illegal if that's what you're referring to and him being the sold developer would have made Dash a centralized currency(And up to the full force of the law, especially since he promised ROI on masternodes). It's probably best that you go inform yourself of the various laws concerning securities, at least in the U.S.