本文件适用于作为规范生产的CIU，其目的是在 适当的登记处。本文件还规定了以下步骤的要求: 创建EN 16931-1中定义的核心发票使用规范（CIU）的过程。此外，这 该文件为CIU的创建和实施提供了指导。购买本文件时可获得的所有当前修订均包含在购买本文件中。

This document applies in case a CIUS is produced as a specification with the objective of registering it in the appropriate registry. This document also establishes requirements for the steps to be taken in the process of creating Core Invoice Usage Specifications (CIUS) as defined in EN 16931-1. Furthermore, this document provides guidance for the creation and implementation of a CIUS.All current amendments available at time of purchase are included with the purchase of this document.