In its judgment of 10 July 1997, in Case C-261/95, Palmisani/INPS, the Court of Justice points out that it is on the basis of the rules of national law on liability that the State must make reparation for the consequences of the loss or damage caused; further, the conditions, in particular time-limits, for reparation of loss or damage laid down by national law must not be less favourable than those relating to similar domestic claims (principle of equivalence) and must not be so framed as to make it virtually impossible or excessively difficult to obtain reparation (principle of effectiveness).