— Steel aid — Recovery of unlawful aid — Application of national law — Conditions and limits — Payment of interest justified by the need to restore the previous situation: judgment of 16 December 1999 (Acciaierie di Bolzano ν Commission, T­158/96)
— Perustelut — Perusteluvelvollisuuden laajuus: tuomio 16.12.1999 (Micro Leader v. komissio, T­198/98)