BLT.AX says CEO and Managing Director Dr Peter French Resigned, page-29

The next thing for them to do is to delist from the ASX real soon now, and let us Aussie shareholders have BNTC as compensation. If the AUD continues to go south in the next few years, the ASX follows, as predicted by some, and the USD becomes stronger as capital flocks to the USA, then this could be a nice hedge play. Removing BLT from a floundering ASX also means that holders of BNTC in a rising US stock market will not have BLT as an adversely performing comparator that holds BNTC back.