Seoul - North Korea has revised its constitution to define its territory as bordering South Korea and remove references to reunification, according to a draft of the ​text, codifying leader Kim Jong Un’s push to treat the two ‌Koreas as ‌separate states.The revision, believed to have been adopted at a ​March meeting of the Supreme People's Assembly, Pyongyang's rubber-stamp legislature, marks the first time North Korea has added a territorial clause to its constitution, Lee Jung-chul, a Seoul National University professor, ⁠told a briefing at South Korea’s Unification Ministry on Wednesday.The new Article 2 says North Korea’s ⁠territory includes land 'bordering the People’s Republic of China and the Russian Federation to the north and the Republic of Korea to the south,” as well ​as territorial waters and airspace based ⁠on that land, according to the text.