【求助】数据保管期限为4年以上

在BERR的官方执行指引上有提到：

原文为：
Materials declarations
35. Producers of EEE could obtain an assurance from their suppliers that any materials, components, assemblies or equipment provided do not contain more than the permitted level of any of the six restricted substances, except where the application of any of those substances comes within the scope of the RoHS Regulations’ exempted applications. Producers are required to keep appropriate records for a period of up to four years after the particular EEE product was put on the market.


出处：官方指引第2008年7月版