After the European Commission first rejected the European Citizens Initiative to Stop Settlements, a successful lawsuit by the organizers (see Moerenhout et al. v European Commission) led to the Commission recognizing its competence to enact a general rule to stop trade with illegal settlements.
The Agreement establishing the WTO (1994) that confirms the objectives of free trade as raising standards of living, ensuring full employment and a large and steadily growing volume of real income and effective demand, and expanding the production of and trade in goods and services.
Core international humanitarian law (1949) that confirms the fundamental prohibition of the transfer of the civilian population of the occupying force to the occupied territory as well as the prohibition of pillaging the occupied territory.
The International Law Commission 2001 Articles on State Responsibility that codify customary international law and recognize that all states have the obligations of non-recognition and non-assistance when another state violates the highest norms of international law.