In just over a week, we'll be celebrating the anniversary of the end of the Soviet occupation of West Berlin. What's that, you don't remember the Soviets having ever occupied West Berlin? Well, don't you remember the Berlin Airlift during which the Soviets prohibited all ground deliveries to West Berlin? What? You don't consider that an occupation and even if it was an occupation, it ended in less than a year and for over 40 years it was possible for supplies to get to West Berlin over land. Fine, does Checkpoint Charlie ring a bell? From the time the Berlin Wall was built until the fall of East Germany, anybody entering of leaving West Berlin had to pass through a phalanx of zigzag barriers and military inspections on the eastern side. What's that? You say that the Soviets still did not have any forces actually present in West Berlin?
Well there you have the real definition of occupation. It consists of forces of the occupying power being garrisoned in the occupied territory and the legitimate government of the territory being unable to function. Yet somehow, this requirement for occupation does not stop much of the world from decrying Israel's occupation of Ramallah and Jenin. Just as Palestinians have to pass through checkpoints when they pass from Area A/B to Area C, Germans had to pass through checkpoints to move between East and West Berlin. Just as the West German government was able to carry the full scope of its operations in West Berlin and no Soviet troops were garrisoned there, the PA is able to carry the full scope of its operations in Area A and there are no IDF troops garrisoned in Area A.
The major argument for the notion that Israel is not occupying the "West Bank" is that there is no legal basis on which to say that the territory belongs to anyone besides Israel. However, there is another why the Palestinian people are not under occupation. Over 90% of the Arab population of the "West Bank" lives in territory governed by the PA. Unless one is willing to say that West Berlin was under Soviet occupation prior to the fall of the Berlin Wall, that means that over 90% of the Arabs of the "West Bank" are not living under occupation.