The Court was established along the lines of the
Kelsenian model of constitutional justice, also called the European Model because it has been adopted by most European countries. Unlike the main alternative, the American model, the features of the Kelsenian model are that only a constitutional court is empowered to find that a statute is unconstitutional, secondly that of abstract review (that is without requiring legal cases but rather through application by public institutions), and thirdly, that appointments to the court are made largely by political bodies and have limited terms. The Constitutional Court is authorized to rule on the
constitutionality of laws, acts, or regulations set forth by the national or the regional parliaments. The Court has the power to settle conflicts of
jurisdiction between the central and the regional governments. Because many of the constitutional provisions pertaining to autonomy questions are ambiguous and sometimes contradictory, it had been suggested from the outset that the Court would play a critical role in Spain's political and social development. It also may rule on the constitutionality of
international treaties before they are ratified, if requested to do so by the Government, the
Congress of Deputies, or the
Senate. The abstract review request, that the court determine the constitutionality of a law, can be brought by the
Prime Minister, the
Ombudsman, fifty members of congress, fifty senators, the executive or parliaments of an
Autonomous Community. In addition, the Court has other powers not typical of the Kelsenian model including determining whether non-legislative acts by the central government, its branches, or the regional governments abide by the distribution of powers defined by the Constitution and other higher laws, hearing complaints from the public about their constitutional rights and preventive review (prior to promulgation) of
statutes of autonomy of the regions. Individual citizens may
appeal to the Constitutional Court for protection against governmental acts that violate their "fundamental rights or freedoms". Only individuals directly affected can make this appeal, called a
recurso de amparo, and they can do this only after exhausting judicial appeals. The General Electoral Law of June 1985 additionally allows appeals to this court in cases where electoral boards exclude candidates from the ballot. The decisions of the Constitutional Court cannot be appealed. ==Composition==