I. INTRODUCTIONEconomic sanctions, unilateral and multilateral, have a long pedigree in international relations. From South Africa 2 and Israel, 3 to Iraq, 4 Iran 5 and North Korea, 6 such measures have, with varying results, been used in diverse contexts to influence the behaviour of States. 7Some would celebrate the use of economic sanctions as a means of punishing "rogue States"for human rights violations or threats to the peace, 8 while others would condemn it as "imperialism" by powerful States against the weak. 9 Leaving aside Chapter VII enforcement action by the UN Security Council, 10 the imposition of unilateral sanctions raises far-reaching questions in respect of the rights and duties of States under international law. 11 A novel issue that has emerged recently is whether, in certain circumstances, such measures could even qualify as crimes against humanity.