(b) (c) lapse of the duration approved by the National Legislature; or issuance of a declaration by the President lifting the state of emergency. Declaration of War 190. (1) The President shall declare war whenever the country is under external aggression and such declaration shall be legal and enforceable subject to approval of the National Legislature by two-thirds of all the members. (2) The declaration of war shall be submitted to the National Legislature within seventy-two hours of the issuance of the declaration if the National Legislature is in session. (3) If the National Legislature is not in session, an emergency session shall be convened and the declaration shall be submitted within 14 days of its issuance. PART FOURTEEN CENSUS, REFERENDA AND ELECTIONS CHAPTER I CENSUS AND STATISTICS The National Bureau of Statistics 191. (1) There shall be a National Bureau of Statistics. (2) The National Bureau of Statistics shall be an independent statistics bureau authorized, inter alia, to: (a) (b) (c) (d) (3) collect, compile, analyze and publish all official statistical information on economic, social, demographic, environmental and general activities and conditions of the people of South Sudan; conduct all censuses and surveys that are carried out throughout South Sudan; monitor and evaluate social impacts of public policies, projects and programmes; and monitor the progress of poverty alleviation and the attainment of the Millennium Development Goals. The President shall appoint a Board of Directors and the Director-General of the Bureau. The Board shall be the highest policy-making body of the National Bureau of Statistics; it shall formulate policies and set its internal regulations, priorities, standards and criteria for all the censuses and surveys to be carried out in South Sudan. 73