Key legal question
Whether the cantonal proceedings were irregular because the foundation was not heard through its board of trustees.
Extracted holding
Yes. The foundation had to be invited to comment through its board of trustees, which alone represented it externally.
Extracted reasoning
The foundation's domicile was at the employer's premises, but its external representation lay with the board of trustees; the employer's letter on foundation stationery, signed by one person, did not bind the foundation.