CEN/TS 16931-13:2026

Electronic invoicing - Part 13: Functional specification and guidance for the eInvoice Registry of CIUS and Extensions CEN/TS 16931-13:2026

Publication date:   Jul 15, 2026

Scope

This document defines the purpose, governance and functional requirements of the eInvoicing Registry for CIUS and Extension Specifications. This document is not to be confused with other business / project focused Technical Specifications. It follows CEN rules and will be published as a CEN document with normative statements.
A key part of this document is to provide a functional specification, which will describe the various functions of eInvoice Registry Services.
The Registry is intended to serve as a structured, transparent and publicly accessible repository that facilitates the discovery, registration and management of eInvoicing Specifications that either restrict the conditional elements of the Core Invoice Model and/or extend it in conformance with Part 5 Extension Methodology.
The scope of this document includes:
- Definition of Registry Services - the structure and capabilities of the Registry including the types of artefacts it stores or references, e.g. CIUS, Extension Specifications, Validation Artefacts and Services, and Code Lists;
- Governance Model - the roles and responsibilities of entities involved in managing and maintaining the Registry;
- Submission and Verification Processes - how Specifications are submitted, reviewed and verified for inclusion in the Registry;
- Functional Specification - the required functionality, processes and procedures that enable the Registry to operate efficiently.