The EU Customs Union means:
Agreement on these four principles between the six founder Member States ( Belgium, France, Germany, Italy, Luxembourg and the Netherlands) led to completion of the Customs Union on 1 July 1968, one and a half years earlier than planned in the 1957 Treaty of Rome.
After 1 July 1968 drafting of the Community customs legislation was pushed forward to make sure that wherever goods are imported into the EU, the same rules are applied. A legal framework was established covering such important points as:
All the rules on the above-mentioned points were finally brought together in a single piece of legislation, the Community Customs Code, which was adopted in 1992.