Roc's volume 2nd only to TLS

ROC has over 16million shares traded mostly @67.5c at 11AM
Interesting that someone or an entity has made the decision to take 67.5c rather than wait for the extra 1.5c on offer ie. 69c. That's about 2.2`% so maybe they think waiting a couple of months is not worth the risk involved for the extra 2.2%.
I would have thought the FIRB approval would be a given considering the main Aussie asset is the mature Cliff Head field and Roc's share of Jingemia onshore production is tiny or nothing.
Any thoughts on Aussie assets and the FIRB decision or other factors causing volume?