Anned conflicts are always hamlflrl for civilians and hence all attempts should be made to avoid them. However; considering that armed conflicts do occur; economic sanctions provide States with a viable alternative. This Article illustrates the need for limitations on the use of economic sanctions. It describes the characteristics of economic sanctions and the existing International Humanitarian Law (IHL) limitations and also suggests that economic sanctions should beflrrther regulated ofering three main principles to guide these limitations: the principle of severity, according to which the most severe economic sanctions should be prohibited; the principle of eflectiveness, according to which economic sanctions should be allowed only ifthe State imposing the sanctions can plausibly demonstrate that the sanctions are effective; and the principle of conditionality, according to which the imposing State should declare specific achievable goals for the sanctions, and lijl the sanctions immediately when these goals are achieved.Economic sanctions, limits on trade, blockades, and other non-armed limitations have always been part of military conflicts. However, their regulation by International Humanitarian Law (IHL) has always been minimal. This Article suggests that recent developments in modem armed conflicts, as well as in modem IHL, necessitate a revision of this position, namely that economic sanctions should be regulated.If new norms relating to the use of economic sanctions are to be adopted, they should not be based on simply copying the traditional IHL norms regarding armed conflicts. Rather, IHLprinciples should be adapted to fit the special nature of economic sanctions.This Article is a response to the recent Israeli use of sanctions against the Hamas government and inhabitants of the Gaza Strip. However, the analysis is not limited to that specific instance and attempts to draw universal conclusions. In addition, it offers general principles of law which control this complicated and almost neglected field of ' Senior Lecturer, Ono Academic College.