Naturalised citizens of TRNC or foreigners carrying a passport stamped by TRNC authorities may be refused entry by the Republic of Cyprus or Greece,[6] although after the accession of the Republic of Cyprus to the EU such restrictions have been eased following confidence-building measures between Athens and Ankara and the partial opening of the UN-controlled line by TRNC authorities. The Republic of Cyprus also allows passage across the Green Line from the part of Nicosia that it controls, as well as a few other selected crossing points, since TRNC does not leave entry stamps in the passport for such visits. Since May 2004 some tourists have taken to flying to the Republic of Cyprus directly then crossing the green line to holiday in northern Cyprus.[7]