On January 21, 2022, Cboe EDGX Exchange, Inc. (“Exchange”) filed with the Securities and Exchange Commission (“Commission”), pursuant to Section 19(b)(1) of the Securities Exchange Act of 1934 (“Act”) ^[1] and Rule 19b-4 thereunder,^[2] a proposed rule change to codify certain practices and requirements related to the Exchange's port message rate thresholds. The proposed rule change was published for comment in the Federal Register on February 9, 2022.^[3] On March 23, 2022, pursuant to Section 19(b)(2) of the Act,^[4] the Commission designated a longer period within which to approve the proposed rule change, disapprove the proposed rule change, or institute proceedings to determine whether to disapprove the proposed rule change.^[5] On May 10, 2022, the Commission instituted proceedings under Section 19(b)(2)(B) of the Act ^[6] to determine whether to approve or disapprove the proposed rule change.^[7] The Commission has received no comment letters on the proposed rule change. On July 21, 2022, the Exchange withdrew the proposed rule change (CboeEDGX-2022-004).