Data Communications Company User Interface Specification [DUIS] Means the SEC Subsidiary Document set out in Appendix AD.Related Articles: Glossary: Countersigned S1SP AlertGlossary: Countersigned SMETS1 ResponseGlossary: Data Communications Company Key Infrastructure Repository Code of ConnectionGlossary: DCC User Interface SpecificationGlossary: Device Alert« Back to Glossary Index Smart Energy Code Subsidiary