declar execut committe april defin concept alien sch decl regard schengen convent june articl thereof regard progress made european union place person cover commun law joint list context articl aforement convent person cover commun law principl joint list person refus entri categori person cover commun law joint list condit govern place compat commun law famili member european union citizen countri nation entitl enter resid member state pursuant decis made accord treati establish european commun nation iceland liechtenstein norwai member famili fall scope provis commun law entri resid emerg commun law cover person includ joint list person refus entri person remain list compat commun law case member state person list step delet list