Key legal question
Whether the subsidized constitutional complaint was admissible despite the potential availability of an appeal in public law matters.
Extracted holding
The public-law appeal was not available because the appellant gave no indication of the value in dispute or any principle question, but the subsidized constitutional complaint was admissible as to the refusal of a derogation.
Extracted reasoning
The incompatibility declaration itself was not legally binding; the refusal of the derogation denied a legal entitlement and affected the appellant's legal interests.