Only installations of X-Road version 6 or higher count. Installing an X-Road production environment means installing and configuring the central components of X-Road (Central Server, management Security Server and management services, X-Road Metrics, Service Catalogue, Trust Services). Instead, it doesn't mean connecting a single Security Server to an existing production environment. Also, in case a national X-Road setup consists of multiple separate environments (e.g., development, test, production), the number of installed production environments is considered one.