50It must be recalled that where the conditions for a State to incur liability are satisfied, a matter which it is for the national courts to determine, it is on the basis of national law that the State must make reparation for the consequences of the loss or damage caused, provided that the conditions laid down by national law in respect of reparation of loss or damage are not less favourable than those relating to similar domestic claims (principle of equivalence) and are not so framed as to make it, in practice, impossible or excessively difficult to obtain reparation (principle of effectiveness) (see judgment in Fuß, C‑429/09, EU:C:2010:717, paragraph 62 and the case-law cited).
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