An article signed by Luca Fiorentini, executive director of TECSA, and Rosario Sicari, risk analyst, entitled “Safety Management Systems for Prevention of Major Accident – the new UNI 10617: 2019” has been published in the January 2020 issue of “Ambinete&Sicurezza sul lavoro” magazine by EPC Editore. The new edition of the UNI 10617 standard “Stabilimenti con pericolo di incidente rilevante – Sistemi di gestione della sicurezza – Requisiti essenziali” underlines once again how only a well thought out and solid systemic approach around unavoidable principles can guarantee the correct functioning of the SMS provided for by Legislative Decree 105/2015. The article, therefore, intends to present its salient aspects.