How to import through a Belgian seaport

At present, the United Kingdom is still part of the European Union and, consequently, free movement of goods is applicable. When the United Kingdom will have left the EU, the goods coming from the United Kingdom will be subjected to controls, import duties and other measures.
Which are the procedural requirements for import?
When goods coming from non-EU-countries are brought into the customs territory of the Union, the following steps will have to be taken before declaring or re-exporting the goods:
  • the lodging of an entry summary declaration (ENS),
  • the arrival of the goods,
  • the presentation of the goods to customs, and
  • the placing of the goods under the temporary storage procedure.
The ENS will be lodged electronically and includes all information that is necessary in order to make a security and safety risk analysis. 
Non-Union goods are under ‘temporary storage’ from the time they are presented to customs until they are placed under a customs procedure or re-exported.