The home country of a diplomat is empowered to withdraw such immunity and this usually happens when the official in question is found to be associated with a crime and/or witness to a crime and in special cases like espionage charges – cases completely unassociated with the diplomatic capacity of the said official. Earlier the definition of the realms of diplomatic immunity was fuzzy, but the Vienna Convention had explicitly defined the codes and arbitrations pertaining to diplomatic immunity, giving an international definition to the said immunity applicable worldwide.
the head of the state allocates certain appanages and exemptions to the said diplomat so that he can dispense his duties in an effective manner on the basis of the tacit understanding that such duties are undertaken on a quid pro quo basis. When a new diplomat is accommodated in a nation as a representative of another nation, the individual representing the sovereignty of the nation i.e. Diplomatic immunity assumes a special significance in maintaining international relationship between sovereign nations, especially under circumstances when such relations are under stress or even when the said nations are involved in a war. Such agreements were arrived at the Vienna Convention on Diplomatic Relations in 1961 and the norms under diplomatic immunity are presently acknowledged as international laws. Diplomatic immunity is essentially a lawful exemption given to the diplomats to secure a free and impervious accessibility of the diplomats, and also to ascertain insusceptibility against any litigation or impeachment under the purview of the legal system of the host country although the diplomats remain subject to deportation.