Case C-659/17: Judgment of the Court (Second Chamber) of 29 July 2019 (request for a preliminary ruling from the Corte suprema di cassazione — Italy) — Istituto nazionale della previdenza sociale (INPS) v Azienda Napoletana Mobilità SpA (Reference for a preliminary ruling — State aid — Employment aid — Exemption from social security contributions in connection with training and work experience contracts — Decision 2000/128/EC — Aid granted by Italy to promote employment — Aid incompatible in part with the internal market — Applicability of Decision 2000/128/EC to an undertaking exclusively providing local public transport services which were directly awarded to it by a municipality — Article 107(1) TFEU — Concept of ‘distortion of competition’ — Concept of ‘effect on trade’ between Member States)