 The two main requirements are exhaustion of local remedies and continuous nationality.Diplomatic espousal of a national's claims will not be internationally acceptable unless the national in question has given the host state the chance to correct the wrong done to him through its own national remedies.Exhaustion of local remedies usually means that the individual must first pursue his claims against the host state through its national courts up to the highest level before he can ask the state of his nationality to take up those claims and that state can validly do so.