FISCAL LEGISLATION - INTERNAL TAXATION - NATIONAL SPIRITS MONOPOLY - DE FACTO REDUCTION IN SELLING PRICE - COMPATIBILITY WITH THE EEC TREATY AND THE AGREEMENTS BETWEEN THE EEC AND SPAIN AND BETWEEN THE EEC AND THE PORTUGUESE REPUBLIC - CONDITIONS ( EEC TREATY , ART . 37 AND ART . 95 ; AGREEMENT BETWEEN THE EEC AND SPAIN OF 29 JUNE 1970 , ART . 3 ; AGREEMENT BETWEEN THE EEC AND THE PORTUGUESE REPUBLIC OF 22 JULY 1972 , ART . 21 )