They have neither the power nor the responsibility to cancel the shares, however as the "manager" of the proceedings, it is their responsibility to notify FINRA that the equity has no value (ie - stock is worthless). That has been inevitable since the Visolis transaction closed (and they had documented it), though it usually happens after the proceedings are complete.
PwC doesn’t actually cancel the shares. FINRA does. What you have seen in the Monitor’s tenth Report is the start of that process. Don’t know when it will happen...
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