ns for the illegality of its conduct:РР(a) the possibility of invoking an emergency situation in relation to an international obligation; orРР(b) the country has contributed to this critical situation.РРTwenty-sixth, the observance of peremptory normsРРA country that violates the obligations arising from a peremptory norm of a general international law may not take any of the provisions of this chapter as a cause for the illegality of any act.РРThe twenty-seventh cited the consequences of the illegality of the act of rescissionРРIn accordance with this chapter, the act of invoking an act of immunity is not prohibited:РР(a) comply with this obligation in and only when the circumstances of the act of illegality are no longer present;РР(b) compensation for any material loss caused by the act.