Whenever the institutions of the Republic, the independence of the nation, the integrity of its territory, or the execution of its international obligations are seriously and immediately threatened, or whenever the regular functioning of the governing authorities or the institutions is disrupted, the President of the Republic shall have access to exceptional powers. The President may, in a message, take any measure, aimed at re-establishing the regular functioning of the governing authorities and to ensure the safeguarding of the nation. He may, by virtue of these exceptional powers, initiate a constitutional revision. The National Assembly shall convene as of right. It shall be seated, for ratification, within fifteen days of their promulgation, of measures of a legislative nature put into force by the President. The Assembly may amend or reject them at the time of voting on the ratification law. These measures shall become null and void if a bill for ratification is not filed with the office of the National Assembly within the set period. The National Assembly cannot be dissolved during the exercise of exceptional powers. When these are exercised after the dissolution of the National Assembly, the poling date set by the dissolution decree may not be postponed, except in the case of force majeure determined by the Constitutional Court.