The European Convention for the Protection of Human Rights and Fundamental Freedoms (ECHR) is a standard-setting instrument for questions related to criminal procedure. Several ECHR provisions refer to the principle of fair trial, personal freedom, non-retroactivity, the right to appeal in criminal matters, and the right not to be tried or punished twice. With respect to the practice of human rights protection in Europe, jurisprudence developed by the European Court of Human Rights (ECourtHR) has crucial impact on the current understanding of those procedural standards. The importance of Strasbourg case-law for the development of common European rules is unquestionable. The practice of national criminal courts as well as national legal doctrine has been heavily influenced by judgments of the ECourtHR. The systematization of case-law concerning criminal procedure is today considered to be an import task of European and national criminal law experts. In this article several factors limiting the impact of Strasbourg case-law on the harmonization of criminal procedure law have been pointed out. The heterogeneity of 47 different European legal orders and the flexible way of implementation of ECourtHR judgments complicates the development of precise rules which are foreseeable to lawyers in European countries. The case overload crisis of the ECourtHR which has been deepening in the past years also may significantly weaken the mechanism and its impact on harmonization. In general, criminal procedure rules formulated by the ECourtHR are mostly regarded as minimum standards. Since the adoption of the Amsterdam Treaty there have been discussions and projects concerning the harmonization of criminal procedure within the European Union. A proposal for a framework decision on certain procedural rights in criminal proceedings throughout the European Union has been presented by the European Commission in 2004. The future of the proposal is uncertain as several EU member states oppose the idea of a legally binding instrument on criminal procedure rights. In any case, a new EU instrument of harmonization has to respect the standards already set out by the ECourtHR.
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