Costa Rica this week changed its migration policy to stop visitors using visas for the EU's Schengen zone or for Japan from entering the country. It came into effect on Tuesday.<br/><br/>The European Union's Schengen zone encompasses 26 countries, including some non-EU countries. Persons can cross internal borders without being subjected to border checks.<br/><br/>The order from Costa Rica's migration service said its change was made after two years of analysis and the necessary changes were based on international accords. <br/><br/>