TAX PROVISIONS - INTERNAL TAXATION - GRANTING OF TAX ADVANTAGES IN FAVOUR OF DOMESTIC PRODUCTS - EXTENSION TO PRODUCTS IMPORTED FROM OTHER MEMBER STATES - CRITERIA - ADVANTAGES RESERVED TO SMALL PRODUCERS OF SPIRITS - RATE OF TAXATION REDUCED IN TERMS OF QUANTITIES PRODUCED - APPLICATION TO IMPORTED PRODUCTS ORIGINATING WITH UNDERTAKINGS HAVING THE SAME PRODUCTION CAPACITY ( EEC TREATY , ART . 95 )