Case C-309/12: Judgment of the Court (Fifth Chamber) of 28 November 2013 (request for a preliminary ruling from the Tribunal Central Administrativo Norte — Portugal) — Maria Albertina Gomes Viana Novo and Others v Fundo de Garantia Salarial IP (Request for a preliminary ruling — Directive 80/987/EEC — Directive 2002/74/EC — Protection of employees in the event of employer’s insolvency — Guarantee institutions — Limitation on the payment obligation of the guarantee institution — Wage claims falling due more than six months before the commencement of legal proceedings seeking a declaration of the employer’s insolvency)