The purpose of this document is to provide guidance for national ATM safety regulators in establishing safety oversight for verifying compliance with the provisions of ESARR 3 “Use of Safety Management Systems by ATM Service Providers‚ (Edition 1.0). The establishment of safety oversight in regard to ESARR 3 is intended to ensure that ATM service providers that fall within the jurisdiction of a national ATM safety regulatory body operate safety management systems in accordance with the provisions of ESARR 3.