NVA Chart, page-626

It's basically just sample spacing. The only reason we wouldn't be able to upgrade the category is if infill drilling (to reducing sample spacing) found holes in the ore body where the model has currently interpolated between our current holes/sample points. Referencing our drilling, historic drilling and supported by the IP survey (also noting they have used the IP survey to limit the bounds or extrapolation) I would say this is fairly unlikely. It's more of a matter of 'when' we upgrade the resource category not 'if' in my opinion. What we've found for what we've spent is nothing short of phenomenal, we could easily upgrade the resource category to indicated or measured for what other explorers have spent to get a much smaller inferred resource. Just my opinion.