The law of neutrality introduces a concomitant set of rights and obligations between belligerents and neutrals. The law as it has settled at the turn of the twentieth century has remained the same in relation to its basic principles, and it has easily adapted to the evolution of the law of the sea, globalized trade and arms technology. The intrusiveness of belligerent practice in the form of exclusion zones, navicerts and distance blockade has become part of the law provided that it does not deviate from the humanitarian law of armed conflict. Moreover, the four Geneva Conventions and the First Additional Protocol admit a humanitarian role for neutral States.