This is definitely possible if CATL are keen. Could be why Mr Pei was in Perth. Conditions would probs be loan is cancelled when 15% from Cominiere is sorted out or paid off gradually through supply with AVZ paying interest until either of those events are completed.
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In my opinion AVZ should and will be very very careful about announcing anything relating to giving CATH 9% even to start with, as the implication would then be that they believe there is a chance that AVZ may lose the 15%.