What nation's land was occupied?
Jordan was the legal Occupying Power of the West Bank from 1949 to 1967.
When Israel conquered the West Bank, they became the legal Occupying Power and are now bound by the 4th Geneva Convention's regulations upon Occupying Powers as they are a signatory to the 4th GC.
We know for a fact that Israel recognizes and acknowledges itself as the legal Occupying Power of the West Bank, because from 1967 to 1979 Israel took control of West Bank land that was privately owned, by confiscating it for temporary military purposes, which 100% follows the legal stipulations listed in the 4th GC as how and when an Occupying Power can legally confiscate private property.
The only problem is that Israel then used the land for permanent civilian settlement, which counters the clear language in the 4th GC. The Israeli Supreme Court knew this, and therefore declared the practice to be illegal in 1979 when an Israeli settlement told the court that counter to the military's claim that the land was being used temporarily, the land was intended for a permanent civilian settlement. Since then Israel has instead used the practice of confiscating private land and converting it into "State Land", and using that for settlements and settlement infrastructure.
The problem with this strategy is that according to the 4th GC, which Israel signed, State land in Occupied Territories can only be used by the Occupying Power for the common good of all residents of the Occupied Territory. Clearly, Israeli settlements and Israeli roads doesn't do much for the Palestinians.