And look, case law:
HUDOC - European Court of Human Rights
From Sargsyan v. Azerbaijan:
94. Article 42 of the Regulations concerning the Laws and Customs of War on Land, The Hague, 18 October 1907 (hereafter “the 1907 Hague Regulations”) defines belligerent occupation as follows:
“Territory is considered occupied when it is actually placed under the authority of the hostile army. The occupation extends only to the territory where such authority has been established and can be exercised.”
Accordingly, occupation within the meaning of the 1907 Hague Regulations exists when a state exercises actual authority over the territory, or part of the territory, of an enemy state(1) .
The requirement of actual authority is widely considered to be synonymous to that of effective control.
Military occupation is considered to exist in a territory, or part of a territory, if the following elements can be demonstrated:
the presence of foreign troops, which are in a position to exercise effective control without the consent of the sovereign. According to widespread expert opinion physical presence of foreign troops is a sine qua non requirement of occupation(2) , i.e
. occupation is not conceivable without “boots on the ground” therefore forces exercising naval or air control through a naval or air blockade do not suffice(3) .
...
144. The Court notes that under international law (in particular Article 42 of the 1907 Hague Regulations) a territory is considered occupied when it is actually placed under the authority of a hostile army, “actual authority” being widely considered as translating to
effective control and requiring such elements as presence of foreign troops, which are in a position to exercise effective control without the consent of the sovereign (see paragraph 94 above). On the basis of all the material before it and having regard to the above establishment of facts, the Court finds that Gulistan is not occupied by or under the
effective control of foreign forces as this would require a presence of foreign troops in Gulistan.
So there you go. Unless we have one standard for Israel and another for everywhere else (which in all honesty is pretty common), Gaza is not occupied. Cause watch this: