No simple answer.
Gold can be sold in country to: another mining company or a dealer of another mining company, or any licenced dealer, who can then say it came from thier own concession.
When you are MINING, not the same as bulksampling, you must register with mines your winnings every month. That IMO is why SNEY say they are bulksampling and is the smart way forward.
Unless you are in SL to get that kind of info is impossible.
When you want to export gold you will have to get an export permit fron Geological Surveys at New England and also from Minintry of Mines.
Remember, gold has only come to the forefront in SL Since 2006/7, prior to that it was all diamonds.
Dredgemaster