下游用户 (DU) 有 12 个月的时间来履行与安全数据表 (SDS) 所附暴露场景 (ES) 相关的义务。这 12 个月是从下游用户收到 SDS 时开始计算，还是从收到注册号时开始计算？

下游用户 (DU) 有 12 个月的时间来履行与安全数据表 (SDS) 所附暴露场景 (ES) 相关的义务。这 12 个月是从下游用户收到 SDS 时开始计算，还是从收到注册号时开始计算？

Downstream users (DU) have 12 months to fulfil their duties related to the exposure scenario (ES) attached to a safety data sheet (SDS). Does the 12 months start as soon as the DUs receive the ES or when they receive the registration number?

根据法律文本，12 个月的期限从用户（DU）收到包含 REACH 注册编号的安全数据表（SDS）时开始计算（REACH 第 39(1) 条）。尽管如此，DU 仍需在 SDS 中附加环境影响声明 (ES)，或至少在 SDS 第 1 部分中列出“不建议使用的用途”，以确定其用途是否确实包含在注册档案中。如果 SDS 中未提供所需信息，建议 DU 与供应商沟通，查明原因，记录沟通内容以及收到环境影响声明的日期。

According to the legal text the 12 months starts as soon as the DU receives an SDS containing a REACH registration number (Article 39(1) REACH). Nonetheless, it is understood that the DU requires an ES to be attached to the SDS, or at least for “uses advised against” to be included in Section 1 of the SDS, in order to determine if their uses are indeed included or excluded in the registration dossier. In cases where the required information has not been provided in the SDS, it is advisable that the DU communicates with his supplier to check why, record this communication, and the date when they receive an ES.