42In respect of the implementation of those obligations by a national court ruling in appeal proceedings, it must be noted that, in the absence of European Union legislation, the procedural rules governing appeal proceedings seeking to safeguard the rights that individuals derive from European Union law fall within the internal legal order of the Member States by virtue of the principle of procedural autonomy of those Member States. However, those rules must not be less favourable than those governing similar domestic actions (principle of equivalence) and may not be framed in such a way as to make it in practice impossible or excessively difficult to exercise the rights conferred by European Union law (principle of effectiveness) (see, to that effect, Banco Español de Crédito, paragraph 46, and Banif Plus Bank, paragraph 26).
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