The Continua Design Guidelines (CDG) defines a framework of underlying standards and criteria that ensure the interoperability of devices and data used for personal connected health services. They also contain additional design guidelines (DGs) that further clarify the underlying standards or specifications by reducing the options or by adding missing features to improve interoperability. This specification defines the additional design guidelines for the Observation Upload Certified Capability Class (CCC), whose function is to transfer an observation measurement from a medical device to a services application over the services interface (Services-IF). Recommendation ITU-T H.812.1 is part of the "ITU-T H.810 interoperability design guidelines for personal connected health systems" subseries that covers the following areas: - ITU-T H.810 - Interoperability design guidelines for personal connected health systems: System overview - ITU-T H.811 - Interoperability design guidelines for personal connected health systems: Personal health devices interface design guidelines - ITU-T H.812 - Interoperability design guidelines for personal connected health systems: Services interface design guidelines - ITU-T H.812.1 - Interoperability design guidelines for personal connected health systems: Services interface: Observation Upload capability - ITU-T H.812.2 - Interoperability design guidelines for personal connected health systems: Services interface: Questionnaires capability - ITU-T H.812.3 - Interoperability design guidelines for personal connected health systems: Services interface: Capability exchange capability - ITU-T H.812.4 - Interoperability design guidelines for personal connected health systems: Services interface: Authenticated persistent session capability - ITU-T H.813 - Interoperability design guidelines for personal connected health systems: Healthcare information system interface design guidelines