(proposed 1978) would have granted the District of Columbia full representation in the United States Congress as if it were a state, repealed the Twenty-third Amendment, granted the District unconditional Electoral College voting rights, and allowed its participation in the process by which the Constitution is amended. A seven-year ratification time limit was placed on the amendment. Sixteen states ratified the amendment (twenty-two short of the number required for it to be implemented) prior to the deadline, thus it failed to be adopted. Judicial review The way the Constitution is understood is influenced by court decisions, especially those of the Supreme Court. These decisions are referred to as precedents. Judicial review is the power of the Court to examine federal legislation, federal executive, and all state branches of government, to decide their constitutionality, and to strike them down if found unconstitutional. Judicial review includes the power of the Court to explain the meaning of the Constitution as it applies to particular cases. Over the years, Court decisions on issues ranging from governmental regulation of radio and television to the rights of the accused in criminal cases have changed the way many constitutional clauses are interpreted, without amendment to the actual text of the Constitution. Legislation passed to implement the Constitution, or to adapt those implementations to changing conditions, broadens and, in subtle ways, changes the meanings given to the words of the Constitution. Up to a point, the rules and regulations of the many federal executive agencies have a similar effect. If an action of Congress or the agencies is challenged, however, it is the court system that ultimately decides whether these actions are permissible under the Constitution. Scope and theory Courts established by the Constitution can regulate government under the Constitution, the supreme law of the land. First, they have jurisdiction over actions by an officer of government and state law. Second, federal courts may rule on whether coordinate branches of national government conform to the Constitution. Until the twentieth century, the Supreme Court of the United States may have been the only high tribunal in the world to use a court for constitutional interpretation of fundamental law, others generally depending on their national legislature. The basic theory of American Judicial review is summarized by constitutional legal scholars and historians as follows: the written Constitution is fundamental law within the states. It can change only by extraordinary legislative process