1 . TAX PROVISIONS - INTERNAL TAXATION - RULE THAT THERE SHOULD BE NO DISCRIMINATION - SCOPE - TAX ADVANTAGES FOR DOMESTIC PRODUCTS - EXTENSION TO PRODUCTS IMPORTED FROM OTHER MEMBER STATES ( EEC TREATY , ART . 95 ) 2 . APPROXIMATION OF LAWS - DISPOSAL OF WASTE OILS - UNDERTAKINGS CONCERNED - ALLOWANCES IN THE FORM OF REDUCTION OF DOMESTIC CHARGES - ADMISSIBILITY - CONDITIONS - COMPLIANCE WITH THE RULE THAT THERE SHOULD BE NO TAX DISCRIMINATION ( EEC TREATY , ART . 95 ; COUNCIL DIRECTIVE NO 75/439/EEC , ART . 13 )