如果下游用户在进行自己的化学品安全评估时，得出结论认为需要对脊椎动物进行研究才能完成评估，并提出测试建议，那么由谁来进行这项研究？

如果下游用户在进行自己的化学品安全评估时，得出结论认为需要对脊椎动物进行研究才能完成评估，并提出测试建议，那么由谁来进行这项研究？

If a downstream user, as part of his own chemical safety assessment, concludes that a study on vertebrate animals is needed to complete the assessment and makes a testing proposal, who conducts the study?

下游用户可以提出测试提案。欧洲化学品管理局 (ECHA) 将审查该提案，并根据 REACH 第 40 条决定进行适当的测试。下游用户有责任进行测试，除非其他下游用户或注册人也有兴趣进行此类测试。相关方可以就由谁代表所有相关方进行测试达成一致。如果无法达成一致，则欧洲化学品管理局应指定其中一方代表所有相关方进行测试。所有相关方将分担研究费用。

A downstream user can make a testing proposal. ECHA examines this proposal and decides on appropriate testing in accordance with Article 40 of REACH. It is the responsibility of the downstream user to perform the test, unless other downstream users or registrants are also interested in carrying out such a test.The interested parties can agree on who will perform the test on behalf of all of them. If agreement is not reached, the Agency shall designate one of the parties to perform the test on behalf of all. All parties concerned share the cost of the study.