++++ FREE MOVEMENT OF PERSONS - NON-DISCRIMINATION - EXCEPTIONS TO BE STRICTLY CONSTRUED - OFFENCE AGAINST NATIONAL PUBLIC POLICY - NATIONAL OF A MEMBER STATE - DEPORTATION - PERSONAL CONDUCT - MEASURE OF A GENERAL PREVENTIVE NATURE - PROHIBITION ( EEC TREATY, ARTICLES 48 AND 56; COUNCIL DIRECTIVE NO 64/221/EEC, ARTICLES 3 ( 1 ) AND ( 2 ))