Not sure if/when it was revoked. Think of it like this. I own the property that my house sits on and all things in the ground (oil, natural gas, etc). My state or country can't just come and take it away without fairly compensating me. I legally own it. In GRZ's case, the resources reside on that land/property that they have title to. His opinion has always been that title to a property is the highest form of protection. Take it with a grain of salt. As I said, I think KRY's legal position is pretty strong as well.