Notice of Filing and Immediate Effectiveness of Proposed Rule Change To Amend the Fee and Rebate Schedule To (i) Increase From 50,000 to 5 Million the Liquidity Adding Average Daily Volume Thresholds in the Automatic Execution Mode of Order Interaction ("AutoEx"); (ii) Include Securities Less Than One Dollar in the Calculation of Liquidity Adding and Total Average Volume Thresholds in AutoEx; and (iii) Eliminate the Two Lower Tiers With Respect to the AutoEx Liquidity Adding Zero Display Order Rebate