Self-Regulatory Organizations; Cboe BYX Exchange, Inc.; Notice of Filing of Amendment No. 1 and Order Instituting Proceedings To Determine Whether To Approve or Disapprove a Proposed Rule Change, as Modified by Amendment No. 1, To Amend Rule 11.25 To Introduce an Optional, Contingent Instruction Applicable to Periodic Auction Only Orders, Introduce a Time-in-Force of Auction or Cancel, and Make Conforming Changes to Its Periodic Auction Processing Behavior To Support the Proposed Contingent Instruction

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