looks like a JORC downgrade to me, for the high grade potash, despite the increased certainty
original JORC included Inferred Mineral Resources of 337Mt at 25.19% K2O (39.86% KCl) = 134mt @ 100% KCI
new JORC has 354mt at 33.6% KCI = 119mt @ 100% KCI
total JORC above 30% KCI looks like 674Mt = 210mt KCI