section_path: Regulation of internal borders/Internal controls
section_name: Internal controls
paragraph_text: Internal controls
  
  The European Union constitutes a customs union and a Value Added Tax area. However, not all Schengen states or all of the territory of Schengen states are part of the customs union or VAT area. Some countries therefore legally conduct customs controls targeted at illegal goods, such as drugs.
  
  Security checks can legally be carried out at ports and airports. Also police checks can be conducted if they: