The Treaty of Rome stipulated that the European Parliament was to be elected by direct universal suffrage, but this required the Council to first agree on a common voting system. The Council hesitated on this issue and the Parliament remained appointed French President Charles de Gaulle was particularly active in blocking the development of the Parliament, since he only obtained budgetary powers after his resignation. [Citation required] Britain refuses to introduce the European Union`s single currency, the euro, with the increasing degree of economic integration, the complexity of its rules is also increasing. These are a number of rules, enforcement procedures and arbitration procedures to ensure that importers and exporters comply with the rules. Complexity entails costs that can undermine the competitiveness of territories in terms of economic integration, as it allows for less flexibility for national policies. The decentralization of economic integration could occur if the complexity and constraints it creates, including the loss of sovereignty, are no longer considered acceptable to their members. With the prospect of further enlargement and the desire to broaden the areas of cooperation, the Single European Act was adopted by the Foreign Ministers on 17 and 28 February 1986 respectively in Luxembourg and Luxembourg. The Hague has signed. Only one document dealt with the reform of the institutions, the extension of powers, external cooperation and the internal market. It entered into force on 1 July 1987.  Following the legislative act, the Maastricht Treaty was drawn up, which was adopted on 10 December 1991, signed the following year and entered into force on 1 November 1993 establishing the European Union and paved the way for European Monetary Union.
It calls for the abolition of a common external customs duty. In so far as the description of a heading or product conforms to the standard nomenclature of the Central American tariff nomenclatures (NAUCA) of the group (three digits), items (five digits) or subheadings (seven digits) in the left column, the heading or goods must include everything in the group, the position or subheading of NAUCA and its codification manual. If the description of the heading or goods is narrower than that of the group, deser or subheading indicated in the left-hand column, the description shall be interpreted as including only that heading or product or the goods expressly mentioned in the list. The best-known example of a common market is the European common market, which aims to ensure the free movement of goods, capital, services and labour within the European UnionEconomicAn economic union is one of the different types of trading blocs. . . .