Freedom of movement for workers in the European Union the European Coal and Steel Community established a right to free movement for workers in these industries and the Treaty of Rome (1957) provided a right for the free movement of workers within the European Economic Community. The Directive 2004/38/EC on the right to move and reside freely assembles the different aspects of the right of movement in one document, replacing "inter alia" the directive 1968/360/EEC. It also clarifies procedural issues, and it strengthens the rights of family members of European citizens using the freedom of movement. According to the official site of the European Parliament, the explanation of the
Statistical Classification of Economic Activities in the European Community systems: NACE uses four hierarchical levels: The first four digits of the code, which is the first four levels of the classification system, are the same in all European countries. National implementations may introduce additional levels. The fifth digit might vary from country to country and further digits are sometimes placed by suppliers of databases. The 21 Level 1 codes are: For a full list of NACE Codes, please refer to: Statistical Classification of Economic Activities in the European Community The Statistical Classification of Economic Activities in the European Community, commonly referred to as NACE (for the French term ""nomenclature