Takozvani Kopenhagenski kriteriji nalažu da za pridruživanje EU zemlje moraju ostvariti "stabilnost institucija kojima se garantiraju demokratija, vladavina prava, ljudska prava i poštivanje manjina, postojanje funkcionalne tržišne ekonomije, kao i sposobnost izlaženja na kraj s konkurentnim pritiskom i tržišnim silama u okviru Unije.
The so-called Copenhagen criteria mandate that to join the EU, countries must achieve "stability of institutions guaranteeing democracy, the rule of law, human rights and respect and protection for minorities, the existence of a functioning market economy as well as the capacity to cope with competitive pressure and market forces within the Union.