Art. 244 - (Parish organs) Art. 245 - (Parish assemblies) Art. 246 - (Parish councils) Art. 247 - (Associations) Art. 248 - (Delegation of tasks) CHAPTER III - Municipalities Art. 249 - (Changes to municipalities) Art. 250 - (Municipal organs) Art. 251 - (Municipal assemblies) Art. 252 - (Municipal councils) Art. 253 - (Associations and federations) Art. 254 - (Share in revenue from direct taxes) CHAPTER IV - Administrative regions Art. 255 - (Creation by law) Art. 256 - (De facto institution) Art. 257 - (Responsibilities) Art. 258 - (Planning) Art. 259 - (Regional organs) Art. 260 - (Regional assemblies) Art. 261 - (Regional councils) Art. 262 - (Government representatives) CHAPTER V - Residents’ organisations Art. 263 - (Formation and area) Art. 264 - (Structure) Art. 265 - (Rights and competences) TITLE IX - Public Administration Art. 266 - (Fundamental principles) Art. 267 - (Structure of the Administration) Art. 268 - (Citizens’ rights and guarantees) Art. 269 - (Regime governing the public service) Art. 270 - (Restrictions on exercise of rights) Art. 271 - (Liability of public sector staff and agents) Art. 272 - (Police) TITLE X - National defence Art. 273 - (National defence) Art. 274 - (Supreme National Defence Council) Art. 275 - (Armed Forces) Art. 276 - (Defence of the nation, military service and civic service) PART IV - Guaranteeing and revision of the Constitution TITLE I - Review of constitutionality Art. 277 - (Positive unconstitutionality) Art. 278 - (Prior review of constitutionality) Art. 279 - (Effects of decision) Art. 280 - (Concrete review of constitutionality and legality) Art. 281 - (Abstract review of constitutionality and legality) Art. 282 - (Effects of declaration of unconstitutionality or illegality)