Social security law prevails over university statutes; non-state school rules cannot exclude income from contribution base.

The Supreme Court dismissed the Social Insurance Institution's appeal against a lower court ruling that had exempted certain university staff from social security contributions. The institution argued that a non-state university's internal regulations could legally exclude specific income types from the contribution base, but the court rejected this. The court held that social security laws establish absolute norms requiring equal treatment and that internal university statutes cannot override these mandatory provisions regarding contribution bases.