Not only under Geneva IV, but under Israel's own black letter law, Israel is prohibited from permanently purchasing land it has conquered. It can only rent it with no change of ownership and only for a military need. Israel never bought a single dunam. Israel still has not paid a dime in rent due.
Obama says world must reach climate deal in Paris 'while we still can' (Reuters)
from the article: Can a U.S.-Israel deal on settlements stop the settlers?