Where the amounts of lump sums, unit costs or flat-rate financing have been determined ex ante by the authorising officer responsible or by the Commission they should not be challenged by ex post controls.
Sa chás ina ndearna an t-oifigeach údarúcháin atá freagrach nó an Coimisiún méideanna na gcnapshuimeanna, na gcostas aonaid nó an mhaoiniúcháin ar ráta comhréidh a chinneadh ar bhonn ex ante, níor cheart iad a agóid trí rialuithe ex post.