This measures are outlined in the new report by Global Witness, published about three weeks ago. They also describe how pressure from Kinshasa to reform the mining sector before the elections has led to the demilitarization of Bisie, the most important tin mine in the region, where army units have been largely replaced by mining police (despite a brief occupation by Mai-Mai forces there last month).
In the meantime, international actors have been moving as well. In a meeting in Paris on May 19, all 34 members of the Organization for Economic Cooperation and Development (OECD) – together with Argentina, Brazil, Lithuania, Latvia, Peru, Romania and Morocco – signed onto a joint framework for due diligence on conflict-free supply chains. While these guidelines are voluntary, it's another step in the direction of creating international norms of due diligence in this sector. The Securities and Exchange Commission (SEC) in the US, for example, has already referenced the OECD guidelines in their draft regulations as the model for what due diligence should look like.