Cypriot President Nicos Anastasiades and the leader of the Turkish-occupied north of the island Mustafa Akinci are holding a second day of complex negotiations at a Swiss resort on how much territory Greek and Turkish Cypriots will run as part of an aimed-for federation.
It's hoped that talks at Mont Pelerin will wrap up Monday with an agreement paving the way for a final summit to agree on post-settlement security arrangements.
Anastasiades and Akinci aim to delineate zones that either side will administratively control.
A 1974 Turkish invasion triggered by a coup aiming at union with Greece divided Cyprus along ethnic lines.
Also on Monday, Greek and Turkish Cypriots will hold a rally in support of peace, inside the UN-controlled buffer zone splitting the capital, Nicosia.