Will be interesting to ask a question about this at tomorrow's AGM.
The tenements will take some time to be granted (if ever, though IMO it should just be a matter of due process).
The annual costs and expenditure requirements may prove quite onerous to CZI even at 30%. As you suggested/implied the "loan" from OZL "until" NB comes on stream should protect CZI's finances.
Some more ideas/information are included in this PDF:
wmp tenement expansion ideas nov 2019.pdf
Maybe see you tomorrow As.