Complex sentence: The equidistance principle or principle of equidistance is a legal concept introduced in maritime boundary claims that a nation's maritime boundaries should conform to a median line equidistant from the shores of neighboring nation-states.
Split into simpler sentences: The equidistance principle or principle of equidistance is a legal concept introduced in maritime boundary claims. The phrase denotes a concept of political geography and international law--that a nation's maritime boundaries should conform to a median line equidistant from the shores of neighboring nation-states.