Translate the following English sentence to French:
"In order to do so, however, I would have to see guarantees on certain fundamental issues, which are the criteria for the quality and efficiency of the enormously important political and economic measure that should result from these directives."
Mais, pour ce faire, il convient de disposer de garanties concernant certaines questions fondamentales qui constituent la pierre de touche du caractère bon et efficace de la dimension politico-économique transcendantale dérivée de ces directives.