I found this;...

I found this;

https://www.hg.org/legal-articles/m...in-the-democratic-republic-of-the-congo-20622

An exploration permit holder is liable for the tax on the surface area of mining concessions at the rates of US$0.02 per hectare for the first year, US$0.03 for the second year, US$0.035 for the third year and US$0.04 for each subsequent year. An exploitation permit holder is liable for this tax at US$0.04 per hectare for the first year, US$0.06 for the second year, US$0.07 for the third year and US$0.08 for subsequent years.