Translate the following English sentence to French:
"I say that it is an unreliable instrument because it does not seem that the studies on which the action plans are based provide useful new features requiring effective policy measures - usually in the form of generic proposals for classic external policy or for development aid - which would only succeed with target-country authorities that were legitimate and stable, which unfortunately is not generally the case."
Et je parle bien d' un instrument précaire car les analyses sur lesquelles se basent les plans d' action ne me semblent pas apporter de nouveaux éléments utiles qui justifient des mesures politiques efficaces, car elles sont la plupart du temps des propositions génériques de politique étrangère classique ou d' aide au développement qui n' atteindraient leur but que devant les autorités des pays cibles qui seraient légitimes et stables, ce qui est malheureusement rarement le cas.