Notice of Designation of a Longer Period for Commission Action on Proposed Rule Change To: (i) Amend Rules 11.190(a)(3) and 11.190(b)(8) To Modify the Operation of the Primary Peg Order Type; (ii) Amend Rule 11.190(h)(3)(C)(ii) and (D)(ii) Regarding Price Sliding in Locked and Crossed Markets To Simplify the Price Sliding Process for Both Primary Peg Orders and Discretionary Peg Orders Resting on or Posting to the Order Book; and (iii) Make Minor Housekeeping Changes To Conform Certain Terminology