Federal and state laws can and do change from time to time, depending on the actions of Congress and the state legislatures. Therefore, the law that exists at the time of the appeal might be different from the law that existed at the time of the events that are in controversy under civil or criminal law in the case at hand. A court of appeals applies the law as it exists at the time of the appeal; otherwise, it would be handing down decisions that would be instantly obsolete, and this would be a waste of time and resources, since such decisions could not be cited as precedent. " court is to apply the law in effect at the time it renders its decision, unless doing so would result in manifest injustice, or there is statutory direction or some legislative history to the contrary."