Two recent, interesting rulings have taken place on the issue of finality of the period fixed by law (currently 90 days, following the amendment of Article 12 of Legislative Decree no. 387 of 2003 by L. 244 of 2007 – the original term was 180 days) for the conclusion of the authorization procedure for installations powered by renewable sources – the cases considered concerned two photovoltaic plants – and the consequent right of entrepreneurs to be compensated for the damage caused by failure to comply with this deadline.