National boundary delimitation

In international law, national boundary delimitation (also known as national delimitation and boundary delimitation) is the process of legally establishing the outer limits ("borders") of a state within which full territorial or functional sovereignty is exercised. National delimitation involves negotiations surrounding the modification of a state's borders and often takes place as part of the negotiations seeking to end a conflict over resource control, popular loyalties, or political interests.

Source: Wikipedia — National boundary delimitation (CC BY-SA 4.0)