This document aims at providing National Aviation Authorities (NAAs) with guidance and recommendations to assist them in developing, documenting and implementing a process for the safety regulatory oversight of new systems and changes in ATM/CNS, in accordance with the provisions of ESARR 1, Edition 2.0 and, for those EUROCONTROL Members States where EC legislation is directly applicable, Commission Implementing Regulation (EU) No. 1034/2011.