37Given that Articles 90(1) and 273 of the VAT Directive do not, outside the limits laid down therein, specify either the conditions or the obligations which the Member States may impose, it must be held that those provisions give the Member States a margin of discretion, inter alia, as to the formalities to be complied with by taxable persons vis-à-vis the tax authorities of those States in order to ensure that the taxable amount is reduced (see, to that effect, Kraft Foods Polska EU:C:2012:40, paragraph 23).
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