However, the effects of this unilateral act as against other states occur on the international plane and are therefore to be determined by international law. Put differently, the jurisdiction of a state to grant its nationality, seen from the outside as a unilateral act by the state, is limited by rules of international law. The limitations imposed by international law are not static, they change with evolving international relations and with the development of international law. An attribution of nationality overstepping these limits (however defined) results in an exorbitant nationality. An exorbitant nationality need not (or perhaps even must not) be accepted or recognised by other states. The Iran-US Claims Tribunal explained the duality of nationality and the secondary role of international law regarding nationality as follows: “International law … does not determine who is a national, but rather sets forth the conditions under which that determination must be recognized by other States.”