Ann: Increase in Copper grade during mining, page-67

malgmac, I know you can't be a lawyer with the following statement

If the grades mined so far materially exceeded what was expected, they have to inform the market in the resource statement.

Who decides materiality?
How often do they look?
how much exceeded is enough to warrant?
Grades? there are random nuggets.

The competent person is called to site and he asks
"how far does this extend?" -- "Don't know yet".
"The other blue bits on the chart..whats there?' -- "Don't know yet exactly, have not dug it up".
"Will it be the same as this bit with the nuggets?" -- see above.
"I need facts and figures, drill cores. analytical results." -- "You have so many already some doddering old dolts thought coring was a new mining technique."
"well, is it, the nuggets, material and should the mining resource be updated?" -- "What the...I was asking you!"

This is what happens in the real world, away from the desk.

They already told you 3.14% moves to 5%. You figure out the rest. Short answer, read the dialogue above.