There are many interesting parts to the code…
“the introduction of a 10 per cent royalty for strategic minerals. The Revised Code defines these as “any mineral substance which, on the basis of the Government’s appreciation of the prevailing economic environment is of special interest given the critical nature of such a mineral and the geo-strategical context”. Although the list of strategic minerals will be confirmed by subsequent regulation, the Minister for Mines has already confirmed that it will include cobalt (of which the DRC is the largest producer globally), as well as coltan, lithium and germanium.”
https://www.herbertsmithfreehills.com/the-democratic-republic-of-congos-revised-mining-code