++++ 1 . AID GRANTED BY STATES - PROHIBITION - INVESTMENT AID GRANTED TO AN UNDERTAKING OPERATING IN A SECTOR HAVING UNUSED CAPACITY ( EEC TREATY, ART . 92 ( 1 ) ) 2 . AID GRANTED BY STATES - COMMISSION DECISION PROHIBITING THE IMPLEMENTATION OF AN AID PROJECT - OBLIGATION TO STATE REASONS - INFORMATION REQUIRED ( EEC TREATY, ART . 92 ( 1 ) AND ART . 190 ) 3 . AID GRANTED BY STATES - PROHIBITION - EXEMPTIONS - AID WHICH MAY BE CONSIDERED COMPATIBLE WITH THE COMMON MARKET - AID HELPING TO PROMOTE THE EXECUTION OF AN IMPORTANT PROJECT OF EUROPEAN INTEREST - POWER OF APPRAISAL OF THE COMMISSION ( EEC TREATY, ART . 92 ( 3 ) ( B ) ) 4 . AID GRANTED BY STATES - PROHIBITION - EXEMPTIONS - AID WHICH MAY BE CONSIDERED COMPATIBLE WITH THE COMMON MARKET - AID TO ENCOURAGE THE DEVELOPMENT OF A SECTOR OF THE ECONOMY - POWER OF APPRAISAL OF THE COMMISSION ( EEC TREATY, ART . 92 ( 3 ) ( C ) ) 5 . AID GRANTED BY STATES - AID PROJECTS - CONSIDERATION BY THE COMMISSION - CONSULTATION PROCEDURE - OBSERVATIONS SUBMITTED BY INTERESTED THIRD PARTIES - OBSERVATIONS NOT COMMUNICATED TO THE AUTHORITY GRANTING THE AID - NO REFERENCE TO THOSE OBSERVATIONS IN THE REASONS GIVEN FOR THE COMMISSION DECISION - INFRINGEMENT OF THE RIGHT TO A FAIR HEARING - NONE ( EEC TREATY, FIRST PARAGRAPH OF ART . 93 ( 2 ) )