Notice of Designation of a Longer Period for Commission Action on a Proposed Rule Change, as Modified by Amendment No. 1 Thereto, Allowing the Exchange To Trade Pursuant To Unlisted Trading Privileges for Any NMS Stock Listed on Another National Securities Exchange; Establishing Listing and Trading Requirements for Exchange Traded Products; and Adopting New Equity Trading Rules Relating To Trading Halts of Securities Traded Pursuant to UTP on the Pillar Platform