Order Instituting Proceedings To Determine Whether To Approve or Disapprove a Proposed Rule Change To Amend Certain Rules Within Rules 4.5 Through 4.16, Which Contains the Exchange's Compliance Rule ("Compliance Rule") Regarding the National Market System Plan Governing the Consolidated Audit Trail (the "CAT NMS Plan" or "Plan"), To Be Consistent With Certain Proposed Amendments to and Exemptions From the CAT NMS Plan as Well as To Facilitate the Retirement of Certain Existing Regulatory Systems