Labor law: Collective guarantee package is a source of labor law; unfavorable changes require notice under Art. 42 § 1 k.p.

The Supreme Court dismissed the plaintiff's cassation appeal against a lower court ruling that denied her severance payment. The plaintiff argued that the collective guarantee package was a source of labor law requiring specific notice for unfavorable changes, while the lower court held the amendment was valid and beneficial. The court ruled that the package is indeed a source of labor law and that any modification detrimental to employees necessitates a notice of change under Article 42 § 1 of the Labor Code.