Document ID: SEC-2022-0744-0001
Agency: sec
Document Type: Notice
Title: Self-Regulatory Organizations; Proposed Rule Changes: The Depository Trust Co.
Posted Date: 2022-05-31T04:00Z

[Federal Register Volume 87, Number 104 (Tuesday, May 31, 2022)]
[Notices]
[Pages 32482-32485]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2022-11534]

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SECURITIES AND EXCHANGE COMMISSION

[Release No. 34-94975; File No. SR-DTC-2022-004]

Self-Regulatory Organizations; The Depository Trust Company; 
Notice of Filing of a Proposed Rule Change To Require Applicants and 
Members To Maintain or Upgrade Their Network or Communications 
Technology

May 24, 2022.
    Pursuant to Section 19(b)(1) of the Securities Exchange Act of 1934 
(``Act'') \1\ and Rule 19-4 thereunder,\2\ notice is hereby given that 
on May 11, 2022, The Depository Trust Company (``DTC'') filed with the 
Securities and Exchange Commission (``Commission'') the proposed rule 
change as described in Items I, II and III below, which Items have been 
prepared by the clearing agency. The Commission is publishing this 
notice to solicit comments on the proposed rule change from interested 
persons.
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    \1\ 15 U.S.C. 78s(b)(1).
    \2\ 17 CFR 240.19b-4.
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I. Clearing Agency's Statement of the Terms of Substance of the 
Proposed Rule Change

    The proposed rule change of DTC consists of modifications to Rules 
\3\ to revise certain provisions in the Rules relating to the 
requirement of applicants for DTC membership, Participants and 
Pledgees, (collectively, ``Participants'') of DTC, to require that each 
Participant upgrade its network technology, and communications 
technology or protocols to meet standards that DTC shall publish from 
time to time, as described in greater detail below.
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    \3\ Capitalized terms not defined herein are defined in the 
Rules, available at https://dtcc.com/~/media/Files/Downloads/legal/
rules/DTC_rules.pdf.
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II. Clearing Agency's Statement of the Purpose of, and Statutory Basis 
for, the Proposed Rule Change

    In its filing with the Commission, the clearing agency included 
statements concerning the purpose of and basis for the proposed rule 
change and discussed any comments it received on the proposed rule 
change. The text of these statements may be examined at the places 
specified in Item IV below. The clearing agency has prepared summaries, 
set forth in sections A, B, and C below, of the most significant 
aspects of such statements.

(A) Clearing Agency's Statement of the Purpose of, and Statutory Basis 
for, the Proposed Rule Change

1. Purpose
    DTC is proposing to adopt a requirement that each Participant 
provide documentation demonstrating that the Participant's network 
technology, and communication technology or protocols meet the 
standards that DTC is currently requiring. The determination to require 
changes or upgrades is incorporated into DTC's procedures and includes 
an evaluation of the external threat landscape, threats to DTC's 
technology infrastructure and information assets, industry 
cybersecurity priorities, a review of the root causes of incidents, and 
an evaluation of the current state of the network infrastructure as 
expressed using third-party assessments. For existing Participants and 
Pledgees, a new requirement is being proposed to require such 
Participants to upgrade their network technology, and communication 
technology or protocols within the timeframe published by DTC. The 
proposed changes are described in greater detail below.
(i) Background of the Requirement
    Currently, DTC does not require, either as part of its application 
for membership or as an ongoing membership requirement, any level or 
version for network technology, such as a web browser or other 
technology, or any level or version of communications technology or 
protocols, such as email encryption, secure messaging, or file 
transfers, that are being used to connect to or communicate with DTC. 
In the current environment, DTC maintains multiple network and 
communications methods and protocols, some either obsolete or many 
years older than the current standard in order to support Participants 
using these older technologies, which leaves communications between DTC 
and its Participants vulnerable to interception or the introduction of 
unknown entries, and requires DTC to expend additional resources, both 
in personnel and equipment, to maintain older communications channels. 
In addition, Participant's use of older technology delays the 
implementation by DTC to upgrade its internal systems, which, by doing 
so, risks losing connectivity with a number of Participants. Given 
DTC's critical role in the marketplace, this is a risk that needs to be 
addressed.
    DTC believes that it should require current network technology, and 
current communication technology and protocol standards for 
Participants connecting to its network. For example, The National 
Institute of Standards and Technology or NIST \4\ Special Publication 
800-52 revision 2, specifies servers that support government-only 
applications shall be configured to use TLS \5\ 1.2 and should be 
configured to use TLS 1.3 as well. These servers should not be 
configured to use TLS 1.1 and shall not use TLS 1.0, SSL 3.0, or SSL 
2.0.\6\ The internet Engineer Task Force (``IETF'') \7\ formally 
deprecated TLS versions 1.0 and 1.1 in March of 2021, stating, ``These 
versions lack support for current and recommended cryptographic 
algorithms and mechanisms, and various government and industry profiles 
of applications using TLS now mandate avoiding these old TLS versions. 
. . . Removing support for older versions from implementations reduces 
the attack surface, reduces opportunity for misconfiguration, and 
streamlines library and product maintenance.'' \8\ TLS 1.0 (published 
in 1999) does not support many modern, strong cipher (encryption) 
suites and TLS 1.1 (published in 2006) is a security improvement over 
TLS 1.0 but still does not support certain stronger cipher or 
encryption suites.\9\ Another communications technology, File Transfer 
Protocol (``FTP'') is considered an insecure protocol, because it 
transfers user authentication data (username and password) and file 
data as plain-text (not encrypted) over the network. This makes it 
highly vulnerable to sniffing attacks that allow an attacker to collect 
usernames and passwords from the network and inject malware into 
downloads via FTP. Following the guidance from NIST and

[[Page 32483]]

other standards organizations, the proposed change would require the 
use of TLS 1.2, Secure FTP (``SFTP''), along with other modern 
technology and communication standards and protocols to communication 
with Participants.
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    \4\ The National Institute of Standards and Technology 
(``NIST'') is part of the U.S. Department of Commerce.
    \5\ Transport Layer Security (``TLS''), the successor of the 
now-deprecated Secure Sockets Layer (``SSL''), is a cryptographic 
protocol designed to provide communications security over a computer 
network.
    \6\ A government-only application is an application where the 
intended users are exclusively government employees or contractors 
working on behalf of the government. The full NIST publication is 
available at https://nvlpubs.nist.gov/nistpubs/SpecialPublications/NIST.SP.800-52r2.pdf.
    \7\ The internet Engineering Task Force (``IETF'') is an open 
standards organization, which develops and promotes voluntary 
internet standards, in particular the technical standards that 
comprise the internet protocol suite (TCP/IP).
    \8\ https://datatracker.ietf.org/doc/rfc8996/.
    \9\ Id.
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(ii) Proposed Rule Changes
    To implement the proposed changes DTC would revise Rule 2, Section 
11 to add the requirement that applicants for membership confirm their 
network technology, and communications technology and protocols to be 
at the levels specified by DTC, as part of their application. Rule 2, 
Section 11 would also be amended to add the requirement that each 
Participant or Pledgee maintain or upgrade their network technology, or 
communications technology, or protocols on the systems that connect to 
DTC to the version being required and within the time periods as 
provided through the Important Notice mechanism on the DTC website. 
Rule 21 would be updated to provide that a Participant or Pledgee who 
fails to perform the upgrade to their network technology, or 
communications technology, or protocols and in the required timeframe 
would be subject to the disciplinary sanctions as specified in the 
Rules.
(iii) Implementation Timeframe and Notification Requirements
    In order to provide Participants and Pledgees adequate time to 
complete a required network technology, or communications technology or 
protocol upgrade, the time for a Participant or Pledgee to complete a 
required upgrade shall be set forth in the form of a notice posted on 
DTC's website, with the timeline determined for the due date of any 
upgrade. DTC maintains a security policy and control standards that 
include a review of industry, vendor and U.S. Government best practice 
guidelines and timelines for security reviews which are used to 
determine whether an upgrade may be required. Due dates for an upgrade 
shall be published on the website based on DTC's reasonable estimates 
of the complexity or potential cost of an upgrade, an estimate of 
potential licensing fees, an estimate of the resources that may be 
needed to support an upgrade, or the urgency to remediate published 
vulnerabilities.
    Applicants to become a Participant or Pledgee shall be required to 
test connectivity to DTC using the current network technology or 
communications technology or protocols with their application for 
membership upon the effective date of the proposal.
2. Statutory Basis
    DTC believes that the proposal is consistent with the requirements 
of the Act \10\ and the rules and regulations thereunder applicable to 
a registered clearing agency. In particular, DTC believes that the 
proposed rule changes is consistent with Section 17A(b)(3)(F) of the 
Act,\11\ and Rules 17Ad-22(e)(17)(i) and (ii), (21), (23) \12\, 
promulgated under the Act as discussed below.
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    \10\ 15 U.S.C. 78a et seq.
    \11\ 15 U.S.C. 78q-1(b)(3)(F).
    \12\ 17 CFR 240.17Ad-22(e)(17), (e)(21), (e)(23).
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Section 17A(b)(3)(F)
    Section 17A(b)(3)(F) of the Act \13\ requires, in part, that the 
Rules be designed to promote the prompt and accurate clearance and 
settlement of securities transactions, to assure the safeguarding of 
securities and funds which are in the custody or control of DTC or for 
which it is responsible and to remove impediments to and perfect the 
mechanism of a national system for the prompt and accurate clearance 
and settlement of securities transactions.
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    \13\ 15 U.S.C. 78q-1(b)(3)(F).
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    DTC believes that the proposed rule change requiring Participants 
to meet DTC's standards for network technology, or communications 
technology or protocols is consistent with this provision of the Act. 
By conditioning an entity's application to DTC on its use of DTC's 
current network technology and communications technology or protocols, 
DTC should be better enabled to reduce the cyber risks of 
electronically connecting to entities by reducing the risks of 
communication interception. Accordingly, the proposed requirement would 
allow DTC to reduce both DTC's and its Participant's exposure to 
interception or the introduction of malware while communicating between 
the entities. Intercepting communications or the introduction of 
malware or altered data could potentially compromise DTC's ability to 
promptly and accurately settle securities transactions and safeguard 
securities funds. The proposal is designed to mitigate those risks and 
thereby promote the prompt and accurate clearance and settlement of 
securities transactions, to assure the safeguarding of securities and 
funds which are in the custody or control of DTC or for which it is 
responsible and to remove impediments to and perfect the mechanism of a 
national system for the prompt and accurate clearance and settlement of 
securities transactions. Providing a clear and consistent standard at 
the current level of network and communication security and technology 
would allow Participants to better understand their obligations with 
respect to such technology and communication requirements and providing 
a uniform obligation for Participants with respect to such 
requirements. As such, DTC believes the proposed rule change is 
consistent with Section 17A(b)(3)(F) of the Act.\14\
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    \14\ Id.
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17Ad 22(e)(21)(iv)
    In addition, the proposed rule change is designed to be consistent 
with Rule 17Ad 22(e)(21)(iv) promulgated under the Act. Rule 17Ad-
22(e)(21)(iv) requires DTC to, inter alia, establish, implement, 
maintain and enforce written policies and procedures reasonably 
designed to be efficient and effective in meeting the requirements of 
its Participants and the markets it serves with regard to the use of 
network technology and communication technologies or protocols. The 
proposed rule change would enhance DTC's security through the use of 
current network technology, or communication technology or protocols, 
and would allow DTC to reduce its and its Participants' exposure to 
interception or the introduction of malware while communicating between 
the entities. This would eliminate the current use of multiple 
generations of network technology and communications technology and 
protocols, including ones that NIST no longer permits for use on 
government systems due to their insecurity. The proposed rule would 
require, after appropriate notice to Participants, future network 
technology and communication or protocol upgrades as technology and 
threats evolve to maintain secure connectivity.
    Therefore, by the reviewing and updating the efficiency and 
effectiveness of Participants' use of network technology and 
communication technology or protocols and procedures, DTC believes the 
proposed change is consistent with the requirements of Rule 17Ad-
22(e)(21)(iv), promulgated under the Act.
Rule 17Ad-22(e)(17)(i)
    DTC believes the proposed change is designed to reduce the 
following risks: (1) The risk of the communications between DTC and its 
Participants being intercepted or introducing malware or other unknown 
harmful elements into DTC's network that could cause harm to DTC; (2) 
the risk that a cyberattack or other unknown harmful elements could be 
introduced from a Participant that

[[Page 32484]]

could cause harm to other Participants.\15\
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    \15\ 17 CFR 240.17Ad-22(e)(17).
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    In addition, the proposed rule change is designed to be consistent 
with Rule 17Ad-22(e)(17)(i) promulgated under the Act,\16\ which 
requires DTC to establish, implement, maintain and enforce written 
policies and procedures reasonably designed to manage the covered 
clearing agency's operational risks by identifying plausible sources of 
operational risk, both internal and external, and mitigating their 
impact through the use of appropriate systems, policies, procedures, 
and controls.
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    \16\ 17 CFR 240.17Ad-22(e)(17)(i).
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    The use of old, obsolete, or insecure network technology or 
communications technologies or protocols, including communications 
between DTC and its Participants that are unencrypted, allowing for 
potential interception or making the communication highly vulnerable to 
sniffing attacks that allow an attacker to collect usernames and 
passwords from the network and inject malware, are examples of 
plausible sources of operational risks that DTC seeks to reduce. By 
requiring all Participants, after appropriate notice, to upgrade their 
network technology or communications technology or protocols to current 
standards, DTC seeks to enhance the security of its systems and the 
communications between it and its Participants.
    Because the proposed changes would help identify and manage such 
operational risks, DTC believes that it is consistent with the 
requirements of Rule 17Ad-22(e)(17)(i), promulgated under the Act.\17\
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    \17\ Id.
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Rule 17Ad-22(e)(17)(ii)
    In addition, the proposed rule change is designed to be consistent 
with Rule 17Ad-22(e)(17)(ii) promulgated under the Act, which requires 
DTC to establish, implement, maintain and enforce written policies and 
procedures reasonably designed ensure that systems have a high degree 
of security, resiliency, operational reliability, and adequate, 
scalable capacity.\18\
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    \18\ 17 CFR 240.17Ad-22(e)(17)(ii).
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    The use of unencrypted network technology and communications 
technology or protocols can allow a third-party to intercept messages, 
insert malware, or change the message content, often without the 
knowledge of either the sender or recipient of the messages or files. 
Requiring Participants to upgrade their network technology and 
communications technology or protocols to more modern and secure 
methods, may eliminate many of the earlier threats.
    Therefore, by requiring Participants to upgrade their network 
technology or communications technology or protocols, DTC believes that 
the proposed change is consistent with the requirements of Rule 17Ad-
22(e)(17)(ii), promulgated under the Act.\19\
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    \19\ Id.
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Rule 17Ad-22(e)(22)
    In addition, the proposed rule change is designed to be consistent 
with Rule 17Ad-22(e)(22) promulgated under the Act, which requires DTC 
to use, or at a minimum accommodate, relevant internationally accepted 
communication procedures and standards in order to facilitate efficient 
payment, clearing, and settlement.\20\
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    \20\ 17 CFR 240.17Ad-22(e)(22).
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    The requirement to use industry approved communications technology 
or protocols, including those that NIST specifies as acceptable for use 
in government systems is a cornerstone of the changes being proposed by 
DTC. The use of older, obsolete, or insecure network technology or 
communications technology or protocols, including those specified to 
not be used by the IETF \21\ represents a risk to efficient payment, 
clearing and settlement.
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    \21\ https://datatracker.ietf.org/doc/rfc8996/.
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    Therefore, by requiring Participants to upgrade their network 
technology or communications technology or protocols, DTC believes that 
the proposed change is consistent with the requirements of Rule 17Ad-
22(e)(22), promulgated under the Act.\22\
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    \22\ 17 CFR 240.17Ad-22(e)(22).
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Rule 17Ad-22(e)(23)
    The proposed rule change is also designed to be consistent with 
Rule 17Ad-22(e)(23)(i), (ii) and (iv) promulgated under the Act, which 
requires DTC to publicly disclose all relevant rules and material 
procedures, provide sufficient information to enable Participants to 
identify and evaluate the risks, fees, potential monetary fines, and 
other material costs they incur by participating in the covered 
clearing agency, and to provide a comprehensive public disclosure that 
describes DTC's material rules, policies, and procedures regarding 
DTC's legal, governance, risk management and operating framework.\23\
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    \23\ 17 CFR 240.17Ad-23(e)(i), (ii), and (iv).
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    Network technology, or communications technology or protocols that 
are being updated would be posted on the DTC website and Participants 
may subscribe to receive updates to such information as it occurs. This 
allows current or prospective Participants the ability to understand 
the risks and potential costs they may incur as a Participant, 
including the potential costs to upgrade its network technology or 
communications technology or protocols to the standards published by 
DTC.
    Therefore, by providing Participants with public and readily 
available access to the required network technology, or communications 
technology or protocols, DTC believes that the proposed change is 
consistent with the requirements of Rule 17Ad-22(e)(23)(i)(ii) and 
(iv), promulgated under the Act.\24\
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    \24\ Id.
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(B) Clearing Agency's Statement on Burden on Competition

    DTC does not believe the proposed changes to require Participants 
to have, or to upgrade their network technology or communications 
technology or protocols would have any impact, or impose any burden on 
competition not necessary or appropriate in furtherance of the purposes 
of the Act.\25\ Although the addition of the requirement to upgrade to 
current network technology or communications technology or protocols 
would be adding obligations on Participants with respect to how they 
communicate with DTC, such obligations would be reasonable because the 
requirements to protect client and customer data would allow DTC to 
reduce both its and its Participants' exposure to interception or the 
introduction of malware while communicating between the entities.
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    \25\ 15 U.S.C. 78q-1(b)(3)(I).
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    DTC believes that the proposed change described herein is necessary 
in furtherance of the purposes of Section 17A(b)(3)(F) of the Act,\26\ 
and Rules 17Ad-22(e)(17), (e)(21), (e)(22), and (e)(23).\27\ The 
proposed changes to require Participants to upgrade their network 
technology, and communications technology or protocols, will (i) allow 
DTC to protect it and its Participants and would promote the prompt and 
accurate clearance and settlement of securities consistent with the 
requirements of Section 17A(b)(3)(F) of the Act,\28\ (ii) identify 
potential operational risks from the use of obsolete and insecure 
network technology and communications technology or protocols 
consistent with Rule 17Ad-

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22(e)(17)(i),\29\ (iii) through the requirement of the use of current 
network technology and communications technology or protocols, ensure 
that systems have a high degree of security, resiliency, operational 
reliability, and adequate, scalable capacity, consistent with Rule 
17Ad-22(e)(17)(ii),\30\ and (iv) through the use of requiring relevant 
internationally accepted communication procedures and standards, 
facilitate efficient payment, clearing, and settlement, consistent with 
Rules 17Ad-22(e)(22).\31\
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    \26\ 15 U.S.C. 78q-1(b)(3)(F).
    \27\ 17 CFR 240.17Ad-22(e)(1), (e)(17), (e)(21), (e)(22) and 
(e)(23).
    \28\ Id.
    \29\ 17Ad-22(e)(17)(i).
    \30\ 17Ad-22(e)(17)(ii).
    \31\ Id.
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    DTC believes that the proposed change described herein is 
appropriate in furtherance of the Act because the NIST standards and 
frameworks provides a common language and systematic methodology for 
managing cybersecurity risk. The IETF, initially supported by the U.S. 
Government,\32\ develops the internet and other technical standards 
used in communications between devices, and together, these are two of 
the leading providers of standards used by organizations to protect 
data and interoperability. DTC maintains policies to review current 
risks and standards, incorporating input from industry, vendors, and 
the U.S. Government to determine best practice guidelines and timelines 
for security reviews.
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    \32\ https://www.internetsociety.org/internet/history-of-the-internet/ietf-internet-society/.
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    Therefore, DTC does not believe that the proposed change would 
impose any burden on competition that is not necessary or appropriate 
in furtherance of the Act.\33\
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    \33\ 15 U.S.C. 78q-1(b)(3)(I).
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(C) Clearing Agency's Statement on Comments on the Proposed Rule Change 
Received From Members, Participants, or Others

    DTC has not received or solicited any written comments relating to 
this proposal. If any written comments are received, they will be 
publicly filed as an Exhibit 2 to this filing, as required by Form 19b-
4 and the General Instructions thereto.
    Persons submitting comments are cautioned that, according to 
Section IV (Solicitation of Comments) of the Exhibit 1A in the General 
Instructions to Form 19b-4, the SEC does not edit personal identifying 
information from comment submissions. Commenters should submit only 
information that they wish to make available publicly, including their 
name, email address, and any other identifying information.
    All prospective commenters should follow the SEC's instructions on 
how to submit comments, available at https://www.sec.gov/regulatory-actions/how-to-submit-comments. General questions regarding the rule 
filing process or logistical questions regarding this filing should be 
directed to the Main Office of the SEC's Division of Trading and 
Markets at [email protected] or 202-551-5777.
    DTC reserves the right not to respond to any comments received.

III. Date of Effectiveness of the Proposed Rule Change, and Timing for 
Commission Action

    Within 45 days of the date of publication of this notice in the 
Federal Register or within such longer period up to 90 days (i) as the 
Commission may designate if it finds such longer period to be 
appropriate and publishes its reasons for so finding or (ii) as to 
which the self-regulatory organization consents, the Commission will:
    (A) By order approve or disapprove such proposed rule change, or
    (B) institute proceedings to determine whether the proposed rule 
change should be disapproved.

IV. Solicitation of Comments

    Interested persons are invited to submit written data, views and 
arguments concerning the foregoing, including whether the proposed rule 
change is consistent with the Act. Comments may be submitted by any of 
the following methods:

Electronic Comments

     Use the Commission's internet comment form (http://www.sec.gov/rules/sro.shtml); or
     Send an email to [email protected]. Please include 
File Number SR-DTC-2022-004 on the subject line.

Paper Comments

     Send paper comments in triplicate to Secretary, Securities 
and Exchange Commission, 100 F Street NE, Washington, DC 20549.

All submissions should refer to File Number SR-DTC-2022-004. This file 
number should be included on the subject line if email is used. To help 
the Commission process and review your comments more efficiently, 
please use only one method. The Commission will post all comments on 
the Commission's internet website (http://www.sec.gov/rules/sro.shtml). 
Copies of the submission, all subsequent amendments, all written 
statements with respect to the proposed rule change that are filed with 
the Commission, and all written communications relating to the proposed 
rule change between the Commission and any person, other than those 
that may be withheld from the public in accordance with the provisions 
of 5 U.S.C. 552, will be available for website viewing and printing in 
the Commission's Public Reference Room, 100 F Street NE, Washington, DC 
20549 on official business days between the hours of 10:00 a.m. and 
3:00 p.m. Copies of the filing also will be available for inspection 
and copying at the principal office of DTC and on DTCC's website 
(http://dtcc.com/legal/sec-rule-filings.aspx). All comments received 
will be posted without change. Persons submitting comments are 
cautioned that we do not redact or edit personal identifying 
information from comment submissions. You should submit only 
information that you wish to make available publicly. All submissions 
should refer to File Number SR-DTC-2022-004 and should be submitted on 
or before June 21, 2022.

    For the Commission, by the Division of Trading and Markets, 
pursuant to delegated authority.\34\
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    \34\ 17 CFR 200.30-3(a)(12).
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J. Matthew DeLesDernier,
Assistant Secretary.
[FR Doc. 2022-11534 Filed 5-27-22; 8:45 am]
BILLING CODE 8011-01-P