September 22, 2005

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VIA FACSIMILE TRANSMISSION AND E-MAIL
Office of the Secretariat

Commodity Futures Trading Commission

Three Lafayette Centre

1155 21° Street, N.W.

Washington, D.C. 20581

Rule Certification. NYMEX Submission 05.170: Implementation of
Temporary Change in Listed Hours for Certain NYMEX Products >

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RE:

Dear Ms. Webb:

The New York Mercantile Exchange, Inc. (“NYMEX”) is notifying the Commodity
Futures Trading Commission (“CFTC”) of a self-certification filing involving a temporary
change in listed hours for certain NYMEX products as further detailed in the attached
NYMEX notice to members. As a note, although this notice by its terms refers to Eastern
Standard Time, consistent with a related press release also distributed today, this
reference should be interpreted as a more general reference to currently applicable

Eastern time.

Pursuant to Section Sc(c) of the Commodity Exchange Act (“Act”) and CFTC.
Rule 40.6, the Exchange hereby certifies that these temporary changes in listed hours,
which constitute “rule” changes for purposes of CFTC submission requirements, comply
with the Act, including regulations under the Act. These temporary rule changes will be
effective only for September 25, 2005 (for trade date September 26, 2005). Should you
have any questions concerning the above, please contact the undersigned at (212) 299-

2207.

Very truly yours,

Brian Regan
Vice President and Counsel

Att.



Notice No. 05-426
September 22, 2005

TO: NYMEX Division Members
FROM: James E. Newsome, President
RE: URGENT: Notice of Temporary Change in Trading Hours on

Sunday, September 25, 2005, for Specified NYMEX Products

Please be advised that, FOR THIS WEEKEND ONLY, due to Hurricane Rita,
the Exchange has determined to implement the following temporary
changes in listed hours for the NYMEX ACCESS®, NYMEX ClearPort®
Trading and NYMEX ClearPort® Clearing systems and for the NYMEX e-
miNY(sm) products listed on the CME® Globex® trading system:

e The trading sessions for NYMEX energy products listed on NYMEX
ACCESS® will commence at 10:00 a.m. EST (with a market pre-open at
9:40 a.m. EST) on Sunday, September 25, 2005, and continue through to
the end of the regular overnight sessions for these products;

° Similarly, the trading sessions for all listed products on NYMEX
ClearPort® Trading will commence at 10:00 a.m. EST (with a market pre-
open at 9:40 a.m. EST) on Sunday, September 25, 2005, and continue
through to the end of the regular overnight sessions for these products;

e Furthermore, the Sunday session for all listed products on NYMEX
ClearPort® Clearing will commence at 10:00 a.m. EST on Sunday,
September 25, 2005, and continue through to the end of the regular
overnight sessions for these products; and

e Finally, the trading session for both NYMEX e-miNY(sm) products listed
on the CME® Globex® trading system will commence at 5:00 p.m. EST
on Sunday, September 25, 2005, and continue through to the end of the
regular overnight sessions for these products.

By comparison, please note that all NYMEX and COMEX Division metals
products will maintain the usual listed trading hours for the Sunday evening
trading session. Also, all NYMEX Europe Limited products listed for trading on
NYMEX ACCESS similarly will maintain the usual listed trading hours for the
Sunday evening trading session


Aside from this temporary change in listed hours, all other rules, policies and
procedures concerning these systems will remain the same.

If you have any questions or require any further information, please contact
exchangeinfo@nymex.com