Download or read book Retroactive Legislation written by Daniel E. Troy and published by American Enterprise Institute. This book was released on 1998 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: The principle in law that the rules are not changed in the middle of game, is embodied in the notion that legislation should apply prospectively. This study analyzes the legal constraints on retroactive legislation and the presumption of prospectivity and constitutional limits on such lawmaking.