In early February, OZ Minerals had also received approval from Brazil's competition regulator, the Administrative Council for Economic Defense, for the proposed buyout.
The copper-gold producer on Dec. 22 entered a scheme implementation deed with the world's largest listed miner, BHP, to proceed formally with the takeover.
The scheme still remains subject to other conditions, including approval by OZ Minerals' shareholders, and by an Australian court.
The scheme meeting is scheduled to be held on April 13, according to OZ Minerals.