Defines a systems management function which may be used by an application process in a centralized or decentralized management environment to interact for the purpose of systems management as defined in CCITT Rec. X.700 / ISO/IEC 7498-4. Defines the usage metering function and consists of service and generic definitions. This standard: - establishes user requirements for service definitions needed to support the usage metering function; - establishes models that relate the service provided by this function to the user requirements; - defines the service provided by the function; - specifies the protocol that is necessary in order to provide this service; - defines the relationships between the service and the operations and notifications for usage metering managed objects; - defines the relationships with other Systems Management functions; - specifies conformance requirements; - defines generic managed object classes, packages, attributes, operations types and notification types, documented in accordance with guidelines for the definition of managed objects; - specifies compliance requirements placed upon other standards which make use of these generic definitions.