This in effect would lead to internationalization of the waters. The waters were not to be subject to blockade, nor could any act of war be committed there, except in enforcing the decisions of the League of Nations. Certain ports were to be declared to be of international importance. The League of Nations insisted on complete freedom and absolute equality in treatment at these ports, particularly regarding charges and facilities, to ensure that economic provisions in commercially strategic places were carried out. These regions were to be called "free zones". The ports were Istanbul from San Stefano to Dolmabahçe, Haidar-Pasha, Smyrna, Alexandretta, Haifa, Basra, Trabzon, and Batum. Eastern Thrace (up to the Chatalja line), the islands of Imbros and Tenedos, and the islands of the Sea of Marmara were ceded to Greece. The waters surrounding these islands were declared international territory and left to the administration of the "Zone of the Straits". The Kurdistan region, including Mosul Province, was scheduled to have a referendum to decide its fate. There was no general agreement among Kurds on what the borders of Kurdistan should be, because of the disparity between the areas of Kurdish settlement and the political and administrative boundaries of the region. The outlines of Kurdistan as an entity were proposed in 1919 by Şerif Pasha, who represented the Society for the Ascension of Kurdistan ("Kürdistan Teali Cemiyeti") at the Paris Peace Conference. He defined the region's boundaries as follows:  The frontiers of Turkish Kurdistan, from an ethnographical point of view, begin in the north at Ziven, on the Caucasian frontier, and continue westwards to Erzurum, Erzincan, Kemah, Arapgir, Besni and Divick (Divrik?); in the south they follow the line from Harran, Sinjar Mountains, Tel Asfar, Erbil, Süleymaniye, Akk-el-man, Sinne; in the east, Ravandiz, Başkale, Vezirkale, that is to say the frontier of Persia as far as Mount Ararat. This caused controversy among other Kurdish nationalists, as it excluded the Van region (possibly as a sop to Armenian claims to that region). Emin Ali Bedir Khan proposed an alternative map which included Van and an outlet to the sea via Turkey's present Hatay Province. Amid a joint declaration by Kurdish and Armenian delegations, Kurdish claims to Erzurum vilayet and Sassoun (Sason) were dropped, but arguments for sovereignty over Ağrı and Muş remained.