I applied for funding 2 years back to have someone conduct a thorough review of recent development in State Immunity. Funding was not granted: quelle horeur!. Reviewers suggested there was no need to revisit an area where law and practice is settled: quelle erreur!
Needless to say both statutory and case-law developments have proven reviewers wrong since. I would still be happy by the way to supervise research in the area (happier still for someone to fund it).
Now, coming to the point: in 16-22.494 Congo v Commisimpex the French Supreme Court essentially held that the French Sapin II law applies retroactively. State assets employed iure imperii are only available for seizure following express and property-specific waiver. The Court’s decision does not reflect unisono developments in other States (neither indeed, I agree with Victor Aupetit), does it help France with regulatory competition in civil procedure: quite a few jurisdictions have taken a more relaxed and wide approach to contractual waiver of State immunity.