Ann: Mining Licence Notification, page-14

Starting January 1, 2026, the MET rates will be as follows: 21.06% for chrome ore; 3.25% for manganese concentrate and ferromanganese ore; 3.64% for iron ore concentrate; 8.55% for copper; 10.5% for zinc; 10.4% for lead; 7.5% for gold and silver; 6.5% for platinum and palladium; 0.38% for aluminum; 3.9% for tin and 7.8% for nickel.
For mineral raw materials containing chrome, titanium, magnesium, cobalt, tungsten, bismuth, antimony, mercury and arsenic, the MET rate will be 7.8%. For carbonization coal and anthracite, it will be 4.05% and for stone-coal, brown coal and oil shale, it will be 2.7%.

I think it'll be in there, but you're right it doesnt specifically mention graphite.