On borders The accepted international rule is that the recognition of borders is not determined by any single sub-national authority, but is mainly based on the will of sovereign states. International law governs this process, but the main participants are the states themselves. This basic principle is clear and has been repeatedly emphasized by the International Court of Justice (ICJ) of the United Nations, for example in the border dispute between Libya and Chad, February 3, 1994: "Determining the border depends on the will of the sovereign states directly concerned." However, it should be noted that Ukraine has not registered all its borders with its neighbors, in particular with Russia. There are bilateral agreements with most of the seven neighbors of independent Ukraine, which determine the course of their common borders: 12 January 1993 with Poland, entered into force on 21 December. October 14, 1993 with Slovakia. May 19, 1995 with Hungary. May 12, 1997 with Belarus, entered into force June 18, 2013. August 18, 1999 with Moldova: Agreement signed August 18, 1999. January 28, 2003 with Russia, but ratified only by Ukraine. June 17, 2003 with Romania, entered into force May 27, 2004. Despite these agreements, about 65% of the Ukrainian border is informal at the legal level. This mainly applies to border areas with: Russia (2,295 km). Moldova (1,222 km). Belarus (1,084 km). This situation is explained by the fact that it is not enough to sign an agreement: after that it is necessary to demarcate, that is, physically mark the border in the field (installation of posts, editing of detailed maps). For these three countries, this process was not completed, and as a result significant areas were not actually "registered" immediately.

On borders The accepted international rule is that the recognition of borders is not determined by any single sub-national authority, but is mainly based on the will of sovereign states. International law governs this process, but the main participants are the states themselves. This basic principle is clear and has been repeatedly emphasized by the International Court of Justice (ICJ) of the United Nations, for example in the border dispute between Libya and Chad, February 3, 1994: "Determining the border depends on the will of the sovereign states directly concerned." However, it should be noted that Ukraine has not registered all its borders with its neighbors, in particular with Russia. There are bilateral agreements with most of the seven neighbors of independent Ukraine, which determine the course of their common borders: 12 January 1993 with Poland, entered into force on 21 December. October 14, 1993 with Slovakia. May 19, 1995 with Hungary. May 12, 1997 with Belarus, entered into force June 18, 2013. August 18, 1999 with Moldova: Agreement signed August 18, 1999. January 28, 2003 with Russia, but ratified only by Ukraine. June 17, 2003 with Romania, entered into force May 27, 2004. Despite these agreements, about 65% of the Ukrainian border is informal at the legal level. This mainly applies to border areas with: Russia (2,295 km). Moldova (1,222 km). Belarus (1,084 km). This situation is explained by the fact that it is not enough to sign an agreement: after that it is necessary to demarcate, that is, physically mark the border in the field (installation of posts, editing of detailed maps). For these three countries, this process was not completed, and as a result significant areas were not actually "registered" immediately.