1) Potsdam Conference (1945) - change borders are forbidden
https://en.wikipedia.org/wiki/Potsdam_Conference
2) UN Charter - change borders are forbidden
https://en.wikipedia.org/wiki/Charter_of_the_United_Nations
3) Helsinki Accords (1975) - change borders are forbidden
https://en.wikipedia.org/wiki/Helsinki_Accords
...
How stupid are putin's facists! So many laws are not allowing to change borders, but putin's facists want to capture small part of Ukraine. And all world must change maps, laws, lessons in geography, change google maps, change bing maps, change everything, because putin's facists want to capture small part of Ukraine.