Organisation for Economic Cooperation & Development (OECD)+Chain of Custody/Traceability/Transparency System (Step 1.C.1)+Mitsubishi Materials Corporation+2018
"The compliance officer will keep the records of all operations concerning responsible minerals sourcing control and retain them for five years. The relevant documents of the control manual will be revised as needed and prperly managed. " "The compliance officer will keep the records of all operations concerning responsible minerals sourcing control and retain them for five years. The relevant documents of the control manual will be revised as needed and prperly managed. "