The principles to be applied are these:
The 4 Points
of President Woodrow Wilson's Address to Congress
of February 11, 1918
Text from The World War I document Archive - please also see this page for the wrapper text.
First, that each part of the final settlement must be based upon the essential justice of that particular case and upon such adjustments as are most likely to bring a peace that will be permanent;
Second, that peoples and provinces are not to be bartered about from sovereignty to sovereignty as if they were mere chattels and pawns in a game, even the great game, now forever discredited, of the balance of power; but that
Third, every territorial settlement involved in this war must be made in the interest and for the benefit of the populations concerned, and not as a part of any mere adjustment or compromise of claims amongst rival states; and
Fourth, that all well defined national aspirations shall be accorded the utmost satisfaction that can be accorded them without introducing new or perpetuating old elements of discord and antagonism that would be likely in time to breaks the peace of Europe and consequently of the world.