中文内容由 Google Cloud Translation 自动生成，仅供参考；请以英文原文为准。问答资料来自欧盟化学品管理局（ECHA）官方网站。
答案（中文）
可以通过以下示例说明这种情况：• 初始通知者（团体创建者，M1）代表由三名成员（M1、M2 和 M3）组成的制造商/进口商团体提交了物质（S）的 C&L 通知（CL）。• 在后期，一名成员（M3）意识到，他们的物质（S3）含有最初通知的物质（S）中不存在的一些杂质/添加剂。这种杂质/添加剂需要不同的分类和标签，因此成员 (M3) 要求小组更新 C&L 通知。• 其他两个成员（M1、M2）希望保留原始 C&L 通知 (CL)。• 根据小组成员之间的协议，可能会出现两种情况。技术解决方案 1• 如果所有成员（M1、M2、M3）都同意物质 (S) 的两套分类和标签，则应使用新的成分和分类更新原始 C&L 通知 (CL)。• 为了将另一种成分添加到您的物质中，请参阅手册：如何准备分类和标签通知，网址为 https://echa.europa.eu/manuals• 提交物质 (S) 的更新 C&L 通知档案时，您应该在 REACH-IT 中注明该通知代表同一组 M1+M2+M3。以下信息将存储在 REACH-IT 中：• 物质 (S) 有两种成分（S、S3）• 每种成分有自己的一套分类和标签（CL、CL3）• 有一个单一的 C&L 通知（涵盖两种成分以及两套分类和标签）适用于所有组成员（M1、M2、M3）技术解决方案 2• 如果没有就物质（S）的单一 C&L 通知达成一致，建议将组一分为二。• 初始通知者（组创建者、M1）可以删除第三个成员（M3），以便原始通知仍然仅对剩余的组成员（M1、M2）有效。无需进行其他更新。• 第三个成员 (M3) 必须独立地使用自己的分类和标签 (CL3) 来通知其物质成分 (S3)。以下信息将存储在 REACH-IT 中：• 物质 (S) 有两种成分 (S、S3)• 每种成分都有自己的一套分类和标签 (CL、CL3)• 有两个独立的 C&L 通知（每个通知涵盖一种成分和一套分类和标签）• 组 (M1、M2) 已使用分类和标签 CL 来通知物质 S• 单一通知人 (M3) 已使用分类和标签 CL3 来通知物质 S3。
Answer (EN)
The situation can be illustrated by the following example:• The initial notifier (group creator, M1) submitted a C&L notification (CL) for a substance (S) on behalf of a group of manufacturers/importers composed of three members (M1, M2 and M3).• At a later stage one member (M3) realises, that their substance (S3) contains some impurity/additive that is absent from the originally notified substance (S). This impurity/additive calls for a different classification and labelling and the member (M3) askes the group to update the C&L notification.• The other two members (M1, M2) want to keep the original C&L notification (CL).• Depending on the agreement between the group members, two scenarios can play out.Technical solution 1• In case all members (M1, M2, M3) agree with both sets of classification and labelling for the substance (S), the original C&L notification (CL) should be updated with the new composition and classification• In order to include another composition to your substance, please refer to the manual: How to prepare a classification and labelling notification available at https://echa.europa.eu/manuals• When submitting the updated C&L notification dossier for substance (S), you should indicate in REACH-IT that the notification is on behalf of the same group M1+M2+M3.The following information will be stored in REACH-IT:• Substance (S) has two compositions (S, S3)• Each composition has its own set of classification and labelling (CL, CL3)• There is a single C&L notification (covering both compositions and both sets of classification and labelling) valid for all group members (M1, M2, M3)Technical solution 2• If there is no agreement on a single C&L notification for the substance (S) it is advisable to split the group in two.• The initial notifier (group creator, M1) can delete the third member (M3), so that the original notification is still valid only for the remaining group members (M1, M2). No other update is needed.• The third member (M3) has to notify their substance composition (S3) with their own classification and labelling (CL3) independently The following information will be stored in REACH-IT:• Substance (S) has two compositions (S, S3)• Each composition has its own set of classification and labelling (CL, CL3)• There are two independent C&L notifications (each covering one composition and one set of classification and labelling)• The group (M1, M2) has notified the substance S with the classification and labelling CL• The single notifier (M3) has notified the substance S3 with the classification and labelling CL3.