Question juridique clé
Whether the foundation's liability claims under Art. 52 LPP were time-barred
Solution extraite
The prescription objection could not be upheld in federal proceedings, and the case had to be sent back for renewed instruction and decision on the merits.
Motifs extraits
Respondents agreed that the foundation's claim was not prescribed; the federal court treated this as a withdrawal of the prescription defense, which the judge cannot raise ex officio.