To understand what happened , a lenghty but interesting article...it gives some hints as how this dispute can be resolved.

http://www.globalresearch.ca/bolivia-s-mine-nationalization-of-south-american-silver-corporation/31942

SAC can become a service provider to the Bolivian government for let's say 40-45% of the project. One thing is sure, Bolivia doesn't necessary have the know how to operate this silver mine. They still need foreigners

A nice speculation stock :-)