++++ 1 . TRANSPORT - SPECIAL INTERNAL RATES AND CONDITIONS - PURPOSE OF SUCH SPECIAL RATES AND CONDITIONS - AUTHORIZATION JUSTIFIED ( ECSC TREATY, ARTICLE 70 ) 2 . TRANSPORT - SPECIAL INTERNAL RATES AND CONDITIONS - UNFORESEEABLE CIRCUMSTANCES JUSTIFYING AUTHORIZATION OF SPECIAL RATES AND CONDITIONS - MODIFICATIONS IN THE INFRASTRUCTURE OF TRANSPORT 3 . ECSC TREATY - GENERAL OBJECTIVES - NATURAL CONDITIONS OF COMPETITION - CONCEPT ( ECSC TREATY, SECOND PARAGRAPH OF ARTICLE 2 ) 4 . ECSC TREATY - GENERAL OBJECTIVES - CONTINUITY OF EMPLOYMENT - PRESERVATION OF BALANCE BETWEEN DIFFERENT GENERAL OBJECTIVES ( ECSC TREATY, ARTICLES 2 AND 3 ) 5 . TRANSPORT - SPECIAL INTEREST RATES AND CONDITIONS - APPLICATION TO A GROUP OF UNDERTAKINGS - AUTHORIZATION PERMISSIBLE ( ECSC TREATY, ARTICLE 70 ) 6 . TRANSPORT - SPECIAL INTERNAL RATES AND CONDITIONS - RESTRICTIVE CLAUSE - AUTHORIZATION EXCEPTIONAL NATURE - TEMPORARY AUTHORIZATION - FIXING OF TIME-LIMIT ( ECSC TREATY, ARTICLE 70 )