SUBMISSION COVER SHEET

IMPORTANT: Check box if Confidential Treatment is requested 

Registered Entity Identifier Code (optional): 21-462

Organization: NEX SEF Limited ("NEXSEF")

Filing as a: DCM SEF DCO SDR 

Please note - only ONE choice allowed.

Filing Date (mm/dd/yy): 10/04/21 Filing Description: Weekly Notification of Rule 

Amendments - Week of September 27, 2021

SPECIFY FILING TYPE 

Please note only ONE choice allowed per Submission.

Organization Rules and Rule Amendments

Certification § 40.6(a)

Approval § 40.5(a)

Notification § 40.6(d)

Advance Notice of SIDCO Rule Change § 40.10(a)

SIDCO Emergency Rule Change § 40.10(h)

Rule Numbers: See filing. 

New Product Please note only ONE product per Submission.

Certification § 40.2(a) 

Certification Security Futures § 41.23(a)

Certification Swap Class § 40.2(d)

Approval § 40.3(a)

Approval Security Futures § 41.23(b)

Novel Derivative Product Notification § 40.12(a)

Swap Submission § 39.5

Product Terms and Conditions (product related Rules and Rule Amendments)

Certification § 40.6(a) 

Certification Made Available to Trade Determination § 40.6(a)

Certification Security Futures § 41.24(a)

Delisting (No Open Interest) § 40.6(a) 

Approval § 40.5(a)

Approval Made Available to Trade Determination § 40.5(a)

Approval Security Futures § 41.24(c)

Approval Amendments to enumerated agricultural products § 40.4(a), § 40.5(a)

“Non-Material Agricultural Rule Change” § 40.4(b)(5)

Notification § 40.6(d)

Official Name(s) of Product(s) Affected: Rule Numbers:
2

Christopher Bowen 

Managing Director and Chief Regulatory Counsel

Legal Department

October 4, 2021

VIA ELECTRONIC PORTAL

Mr. Christopher J. Kirkpatrick

Office of the Secretariat

Commodity Futures Trading Commission

Three Lafayette Centre

1155 21st Street, N.W.

Washington, DC 20581

Re: CFTC Regulation 40.6(d) Notification. NEX SEF Limited (“NEX SEF”) Weekly 

Notification of Rule Amendments.

NEX SEF Submission No. 21-462

Dear Mr. Kirkpatrick:

Pursuant to Commodity Futures Trading Commission (“CFTC” or “Commission”) Regulation 40.6(d), NEX SEF

submits this weekly notification of the following rule amendments effective during the week of September 27, 

2021.

Effective October 2, 2021, to better support EBS clients and to ensure a continued high level of service to clients 

during CME Globex migration testing, NEX SEF amended its customer support hours. The marketplace was 

informed of the change via Market Regulation Advisory Notice (“MRAN”) NEX SEF 2021-04, which is attached 

hereto as Exhibit A. 

Copies of the above-referenced materials are available at www.cmegroup.com. If you require any additional 

information, please e-mail CMEGSubmissionInquiry@cmegroup.com or contact the undersigned at (212) 299-

2200.

Sincerely,

/s/ Christopher Bowen

Managing Director and Chief Regulatory Counsel

Attachment: Exhibit A – MRAN #NEX SEF 2021-04
3

Exhibit A

MARKET REGULATION ADVISORY NOTICE

______________________________________________________________________

Exchange NEX SEF

Subject Facility Customer Support

Rule References Rule 901 – NEX SEF NDF System Protocol

Advisory Date September 14, 2021

Advisory Number NEX SEF 2021-04

Effective Date October 2, 2021

Effective October 2, 2021, to better support EBS clients and to ensure a continued high level of service to clients 

during CME Globex migration testing, please be advised of the following change to EBS Customer Support 

coverage over the EBS weekend maintenance window:

New hours of EBS Customer support:

• Start: Sunday 08:00 BST/GMT

• End: Saturday 16:00 BST/GMT

Changes will be made to the EBS Dealing rules, EBS MTF Rulebook and NEX SEF rulebook to reflect the new 

hours and will be available to view on the effective date via https://www.cmegroup.com/trading/market-techand-data-services/ebs/regdocs.html. 

NEX SEF Rulebook

Chapter 9

(“System Protocols”)

(additions underscored; deletions struck through)

Rule 901 – NEX SEF NDF System Protocol

***

(h) TRADING PRIVILEGE HOLDER OR AUTHORISED TRADING FIRM SUPPORT

Facility Customer Support is available during Facility Hours 24x7 to assist Trading Privilege 

Holders or Authorised Trading Firms with all issues pertaining to the NEX SEF Dealing Service.

The Commodity Futures Trading Commission (“CFTC”) will be notified of the aforementioned during the week of 

October 4, 2021, via the weekly notification procedures set forth in Part 40 of the CFTC Regulations.

Please note that there are no changes to customer support outside the EBS Weekend Maintenance period, or 

to system availability at any time. If you have queries, please contact your EBS Account Manager or the EBS 

Support team.

Questions regarding this Advisory Notice may be directed to NEX SEF at NEXSEF_Support@nex.com

For media inquiries concerning this Market Regulation Advisory Notice please contact CME Group Corporate Communications at 

312.930.3434 or news@cmegroup.com.