What is the effect of the Court of Appeal's recent finding that new legislation on overcharge calculation does not apply retroactively?

Our "Court ... plays a crucial and necessary function in our system of checks and balances. It is the responsibility of the judiciary to safeguard the rights afforded under our State [and Federal] Constitution[s]" ( People v. LaValle, 3 N.Y.3d 88, 128, 783 N.Y.S.2d 485, 817 N.E.2d 341 [2004] ). Our narrow holding here determining that newly-enacted overcharge calculation provisions may not be applied retroactively constitutes nothing more than an appropriate exercise of this quintessentially judicial authority.