According to a 19b from PHLX with the SEC:Quote from Option Trader:
What's the sense of this one? Is this IB or PHLX?
"the Exchange adopted a cancellation fee of $1.10 per cancellation order to be assessed on member organizations for each cancelled AUTOM-delivered order in excess of the number of orders executed on the Exchange by that member organization in a given month."
So, it's not exactly what IB is charging, structure wise, but is relatively close.