translate English to French: In regard to the complex relationship between obligations erga omnes and norms of jus cogens, it was observed that while all jus cogens obligations had an erga omnes character, the reverse was not necessarily true.
En ce qui concerne les liens complexes entre les obligations erga omnes et les normes de jus cogens, il a été noté que, si toutes les normes de jus cogens s'imposaient erga omnes, l'inverse n'était pas forcément vrai.