council resolut februari futur commun polici european coastal zone council european commun recogn european coastal zone includ island fragil vital common heritag essenti biolog divers landscap ecolog qualiti capac sustain life health econom activ social safeguard emphas kei sustain develop coastal zone li full integr econom physic plan environment polici acknowledg vulner environ includ natur cultur heritag coastal area explicitli account develop coastal polici take note final declar european coastal conserv confer held hagu netherland novemb futur polici regard european coastal zone conclud take account subsidiar principl clear commun strategi integr plan manag coastal zone base principl sustain sound ecolog environment practic conclud conserv sustain coastal zone fundament aspect strategi high prioriti specif action field invit commiss propos consider commun strategi integr coastal zone manag provid framework conserv sustain incorpor initi environment action programm