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como señala m. a. tunks, "[i]n practice, it is extremely uncommon for a sitting head of state's immunity to be waived because he is often the person who has the power to control whether or not to issue a waiver ".
as michael a. tunks notes, "[i]n practice, it is extremely uncommon for a sitting head of state's immunity to be waived because he is often the person who has the power to control whether or not to issue a waiver ".