++++ 1 . PROCEDURE - PRELIMINARY RULING - NATIONAL COURT - INTERPRETATION OF THE COURT OF JUSTICE BINDING - RIGHT TO MAKE A FURTHER REFERENCE TO THE COURT OF JUSTICE ( EEC TREATY, ARTICLE 177 ) 2 . POLICY OF THE EEC - COMMON RULES - TAX PROVISIONS - CUMULATIVE MULTI-STAGE TAX - AVERAGE RATES FOR IMPORTED PRODUCTS OR GROUPS OF IMPORTED PRODUCTS - ESTABLISHMENT BY MEMBER STATES - OBJECT OF THIS POWER ( EEC TREATY, ARTICLE 97 ) 3 . POLICY OF THE EEC - COMMON RULES - TAX PROVISIONS - CUMULATIVE MULTI-STAGE TAX - AVERAGE RATES FOR IMPORTED PRODUCTS OR GROUPS OF IMPORTED PRODUCTS - ESTABLISHMENT BY MEMBER STATES - POWERS OF NATIONAL COURTS OF THE COMMISSION AND OF OTHER MEMBER STATES ( EEC TREATY, ARTICLE 97 ) 4 . POLICY OF THE EEC - COMMON RULES - TAX PROVISIONS - CUMULATIVE MULTI-STAGE TAX - AVERAGE RATES FOR IMPORTED PRODUCTS OR GROUPS OF IMPORTED PRODUCTS - CONCEPT ( EEC TREATY, ARTICLE 97 ) 5 . POLICY OF THE EEC - COMMON RULES - TAX PROVISIONS - CUMULATIVE MULTI-STAGE TAX - AVERAGE RATES FOR IMPORTED PRODUCTS OR GROUPS OF IMPORTED PRODUCTS - ESTABLISHMENT BY MEMBER STATES - FORM ( EEC TREATY, ARTICLE 97 ) 6 . POLICY OF THE EEC - COMMON RULES - TAX PROVISIONS - CUMULATIVE MULTI-STAGE TAX - AVERAGE RATES FOR IMPORTED PRODUCTS OR GROUPS OF IMPORTED PRODUCTS - RATE FOR ONE STAGE AS AN AVERAGE RATE - POSSIBILITY - CONTRARY TO ARTICLES 95 AND 97 - WITHOUT EFFECT ON THE CHARACTER OF THIS RATE AS AN " AVERAGE RATE " ( EEC TREATY, ARTICLE 97 ) 7 . POLICY OF THE EEC - COMMON RULES - TAX PROVISIONS - CUMULATIVE MULTI-STAGE TAX - AVERAGE RATES FOR IMPORTED PRODUCTS OR GROUPS OF IMPORTED PRODUCTS - COMPOSITION OF GROUPS OF PRODUCTS LIABLE TO AN AVERAGE RATE - WITHOUT EFFECT ON THE CHARACTER OF THIS RATE AS AN " AVERAGE RATE " ( EEC TREATY, ARTICLE 97 )