This part of IEC61162 is an add-on to IEC61162‑450 where higher safety and security standards are needed, for example due to higher exposure to external threats or to improve network integrity. This document provides requirements and test methods for equipment to be used in an IEC61162‑460 compliant network as well as requirements for the network itself and requirements for interconnection from the network to other networks. This document also contains requirements for a redundant IEC61162‑460 compliant network. This document does not introduce new application level protocol requirements to those that are defined in IEC61162‑450 .