OPC UA Safety uses the OPC UA services for connection establishment, it poses no additional requirement to these services.
NOTE: This version of the specification describes configuration only at engineering time. This means that the parameters defined in the SPI (see Clauses 7.3.2 and 7.4.1) are read-only via the interface described in this specification. Changing of parameters are expected to be done in a safety-related way, using the respective tools and interfaces provided by the vendor. Future versions of this part may specify a vendor-independent interface for configuration.