To realize secure, stable, efficient, and robust operations of and services by a quantum key distribution (QKD) network as well as to manage a QKD network (QKDN) as a whole and support user network management, Recommendation ITU-T Y.3804 specifies functions and procedures for QKDN control and management based on the requirements specified in Recommendation ITU‑T Y.3801. This revision of the Recommendation adds the description of reference point Mx and the management procedures in Subscription-Notification information exchange.