The legitimacy and legal consequences of the agreement have been challenged by a number of states in the region as well as by the European Union. According to the European Union, the agreement „violates the sovereign rights of third countries, is not in accordance with the law of the sea and cannot have legal consequences for third countries.“  Cyprus and Egypt both considered the agreement „illegal“, while Greece considers it „unconfessed“ and „geographically absurd“ because it ignores the presence of the islands of Crete, Kasos, Karpathos, Kastellorizo and Rhodes between the Turkish and Libyan coasts.  Greece recognizes its territories within the area between the region of Crete and the island of Meyisti as a single coast. On the other hand, Turkey argues that it is mainly the continental shelves and the borders of the EEZs that must be defined between Libya, Egypt and Turkey. The right of South Cyprus to continental status in the Mediterranean and the agreements based on that acceptance are not valid under international law. Even under the Vienna Convention on Treaty Law, southern Cyprus cannot ignore the equal rights of northern Cyprus and unilaterally take decisions on behalf of the Turkish people living on the island. Turkey and the TRNC disputed the agreements and indicated that the Cyprus-Egypt agreement violated Turkey`s continental borders, that southern Cyprus seriously violated the equality rights of the TRNC, and that these violations were contrary to the principle of fair distribution. This is because coastal geography and structure play a very important role in delimiting marine areas. It is the deciding factor in most years, and it is based on two fundamental principles; „The master of the country`s domination over the sea“ and „the coastal state must establish this domination on its coasts.“ This fundamental principle has been put forward in all related judicial decisions (Malta-Libya case, continental shutdown case in the Aegean Sea, case of Guinea-Bissau). The agreement, signed in Istanbul on 27 November 2019, contains the following provisions: The dispute has left Ankara in search of allies in the region. The new agreements were signed on Wednesday during a meeting between Turkish President Tayyip Erdogan and Fayez al-Serraj, head of the Tripoli government, which supports Ankara against a rival military power in eastern Libya. The agreement between Turkey and Libya was signed on 27 November by Turkish President Recep Tayyip Erdogan and Libyan Presidential Council President Fayiz es-Serrac.
The agreement is approved by the Grand National Assembly of Turkey and the UN will be informed of the agreement after Libya`s approval. With the agreement on Libya, Turkey has taken a revolutionary initiative that, historically, will have a great influence on the energy geopolitics of the eastern Mediterranean. The assumption that Turkey could not agree with other states in the region has also proved to be wrong and the doors to new agreements with Egypt, Lebanon and Israel are now open with the agreement on Libya. This also confirmed Turkey`s strong position and proved that it was not possible, legally and practically, to ignore Turkey`s existence in the region.