DSNA will manage 3 versions of the service:
Versions N (i.e. nominal version of the service) and N-1 (if existing) provided by the operational system, Version N-1 will be removed when all consumers have migrated to the nominal version of the service or when the version N+1 is commissioned (Constraint of evolutivity).
Version N or N+1 (if existing) provided by a pre-operational (preops) system.
Please get in touch with the Service Provider / Consumer Point of Contact for any evolution request regarding this Service.