1 . AIDS GRANTED BY STATES - PLANS TO GRANT AID - REVIEW BY THE COMMISSION - PRELIMINARY STAGE - PURPOSE - DUTIES OF THE COMMISSION - EXPIRY OF REASONABLE PERIOD FOR CARRYING OUT THE REVIEW - IMPLEMENTATION OF AID - PRIOR NOTICE ( EEC TREATY , ART . 93 ( 1 ), ( 2 ) AND ( 3 )) 2.AIDS GRANTED BY STATES - PLANS TO GRANT AID - REVIEW BY THE COMMISSION - PRELIMINARY REVIEW AND MAIN REVIEW - RESPECTIVE CHARACTERISTICS - COMPATIBILITY OF THE AID WITH THE COMMON MARKET - DIFFICULTIES IN APPRAISAL - COMMISSION ' S DUTY TO INITIATE THE MAIN REVIEW PROCEDURE ( EEC TREATY , ART . 93 ( 2 ) AND ( 3 )) 3.ACTION FOR FAILURE TO ACT - NOTICE TO THE INSTITUTION - EXPRESS REQUEST TO ACT - NONE ( EEC TREATY , ART . 175 , SECOND PARA .)