Design of Due Diligence Measures To better manage our supply­chain and facilitate the due diligence and disclosure required by the SEC, we established management systems and due diligence procedures (our “3TG Minerals Due Diligence Process”) based on guidance from the Organisation for Economic Co­operation and Development’s OECD Due Diligence Guidance for Responsible Supply Chains of Minerals from Conflict­affected and High­Risk Areas.