The Commission’s proposal to establish an entry-exit system could play a useful role as regards detecting overstayers from states whose nationals are subject to a visa obligation, if implemented in conjunction with a registered traveller system. However, the Commission has not properly explained or calculated the costs of establishing such a system, and has not established the need for such a system as regards non-visa nationals.
Document: http://www.europarl.europa.eu/
Download at PDF format