translate English to French: The outcome of that process was often uncertain and context-specific; under international case law, States had a significant margin of appreciation in assessing the appropriateness of such restrictions, and it would be difficult, if not impossible, to elaborate general rules and criteria in that respect.
La solution est souvent incertaine et varie selon le contexte.  Selon la jurisprudence internationale, l'État dispose d'une grande latitude pour apprécier l'opportunité de telles restrictions et il serait difficile, voire impossible, d'élaborer des règles et des critères dans ce domaine.