Question juridique clé
Whether the appellant was entitled to a survivor’s concubinage pension from Fondation 1 despite no legalized written agreement and no notification to the fund during the insured’s lifetime.
Solution extraite
No entitlement existed because the regulatory formalities were a substantive condition and were not met.
Motifs extraits
The regulation required a legalized written agreement or equivalent notice to the fund during the insured’s lifetime. The deceased had enough time after the rule change to comply. The requirement was justified by equal treatment and legal certainty, and was not disproportionate.