Checks carried out at border crossing points to ensure that persons, including their means of transport and the objects in their possession, may be authorised to enter the territory of the Schengen
As of December 2011, the Schengen Area consists of the following EU States: Belgium, Czech Republic, Denmark, Germany, Estonia, Greece, Spain, France, Italy, Latvia, Lithuania, Luxembourg, Hungary, Malta, Netherlands, Austria, Poland, Portugal, Slovakia, Slovenia, Finland and Sweden. This means that the other EU States (i.e. Bulgaria, Cyprus, Ireland, Romania and the United Kingdom) are not (yet) part of Schengen. Whilst Iceland, Liechtenstein, Norway and Switzerland are not EU States, they have signed an Association Agreement in order to be associated with the implementation, application and development of the Schengen acquis.