Do the provisions of Article 30 of TFEU preclude an interpretation to the effect that, when a taxpayer has in fact paid a charge having equivalent effect, he may request the recovery of the sums paid by way of that charge even though national legislation has designed a payment mechanism for that charge in such a way as to pass it on to the European consumer? Is the recovery of sums collected in respect of a charge having equivalent effect, when those sums were in fact paid by the taxpayer (but not passed on to the consumer), compatible with EU law?