Ms. Jean A. Webb

Amendments to Frost Days and Seasonal Frost Days Futures
December 1, 2005

Page 4

These amendments will be applied to all existing and newly listed contract months. There is no
open interest in any Frost Days or Seasonal Frost Days futures or options, so there are no
outstanding positions that would be affected by this change.

On Friday, December 2, 2005, the Exchange will temporarily de-list all currently listed Frost
Days and Seasonal Frost Days futures and options. On Monday, December 5, 2005, the
Exchange will re-list all currently listed Frost Days and Seasonal Frost Days futures and options,
and trading will resume.

The Exchange certifies that this action complies with the Commodity Exchange Act and the
regulations thereunder.

If you have any questions regarding this submission, please contact Mr. Paul Peterson at (312)
930-4587 or via e-mail at ppeterso@cme.com or Mr. Charles Piszczor at (312) 930-4536 or via
e-mail at cpiszczo@cme.com. Please refer to CME Submission #05-126 in all correspondence
regarding this matter.

Sincerely,

John W. Labuszewski, Managing Director
Research & Product Development


cmesé

Chicago Mercantile Exchange

20 South Wacker Drive 312/930.1000 tel
Chicago, IL 60606-7499 312/466.4410 fax
www.crne.com :

December 1, 2005

Ms. Jean A. Webb

Office of the Secretariat

Commodity Futures Trading Commission
Three Lafayette Centre

1155 21" Street, NW

Washington DC 20581

RE: — Section Sc(c)1 and Regulation 40.6 Submission. Exchange Certification of Amendments
to CME Frost Days Index Futures and CME Seasonal Frost Days Index Futures. CME
Submission #05-126.

Dear Ms. Webb:

On November 23, 2005, Chicago Mercantile Exchange Inc. (“CME” or “Exchange”) approved
amendments to CME Frost Days Index Futures and CME Seasonal Frost Days Index Futures.
These amendments cause the underlying indexes to be calculated using the final temperature
values from the respective national meteorological offices, rather than the preliminary
temperature values issued by those same offices. These data changes in turn require
modifications to the termination of trading and final settlement schedules. In addition, redundant
tule language has been eliminated for the sake of clarity.

The amendments are presented below, with additions underlined and deletions bracketed and
overstruck.

CME Frost Days Index Futures
41601. COMMODITY SPECIFICATIONS

1. Frost Days

A “Frost Day” shall be defined as a day in which one or more of the following
particular location: during-the he-firs nday-_in-Novemberan
in-March_exeluding- Saturdays Sund D ber-25,-Di ber-26,-and-d 4F "

¥Sr ¥
-od-at the following-times-f hlocati rted-by Earth Satellite-Ci ti
'¢ o PO af

conditions is true fora



41602.

Ms. Jean A. Webb

Amendments to Frost Days and Seasonal Frost Days Futures
: December 1, 2005
Page 2

« The temperature at 0700 local time (0600 UTC, except 0500 UTC beginning the last Sunday
in March) is less than or equal to -3.5 degrees Celsius;

« — The temperature at 1000 local time (0900 UTC, except 0800 UTC beginning the last Sunday
in March) is less than or equal to -1.5 degrees Celsius;

* The temperature at 0700 local time (0600 UTC, except 0500 UTC beginning the last Sunday
in March) is less than or equal to -0.5 degrees Celsius, and the temperature at 1000 local time
(0900 UTC, except 0800 UTC beginning the last Sunday in March) is less than or equal to -0.5
degrees Celsius.

2. The CME Frost Days Indexes and Listing Cities

Each particular CME Frost Days Index is the accumulation of like Frost Days during a month within the
period beginning the first Monday in November and ending the last Friday in March, excluding
Saturdays, Sundays, December 25, December 26, and January 1. Each particular Index shall_be
computed by Earth Satellite Corporation using final temperature observations reported by the respective
national meteorological office.

Listing Cities and Corresponding Weather Stations
. Amsterdam-Schiphol, Netherlands (WMO 06240)

FUTURES CALL
G. Termination of Trading

For the November, December, January and February contract months, futures trading shall terminate at
9:00 A.M. on the first Exchange business day that is at least [twe]six calendar days after the respective
futures contract month. For the March contract month only, futures trading shall terminate at 9:00 A.M.
on the first Exchange business day that is at least [twe]six calendar days after the last Friday in March.

(Remainder of Rule 41602 unchanged)

41603.

SETTLEMENT PROCEDURES
A. Final Settlement Price

All futures contracts remaining open at the termination of trading shall be settled using the respective
CME Frost Days Index reported by Earth Satellite Corporation for that city for that contract period,
using the methodology in effect on that date. For the November, December, January and February
contract months, final settlement shall occur on the first Exchange business day that is at least [two]six
calendar days after the respective futures contract month. For the March contract month only, final
settlement shall occur on the first Exchange business day that is at least [twe]six calendar days after the
last Friday in March. For example, on March {2]7, 2005, the February 2005 futures contract on the
CME Amsterdam-Schiphol Frost Days Index would have been settled at 2 Frost Days.

(Remainder of Rule 41603 unchanged)

CME Seasonal Frost Days Index Futures

41701.

COMMODITY SPECIFICATIONS
1. Frost Days


41702.

Ms. Jean A. Webb

Amendments to Frost Days and Seasonal Frost Days Futures
December 1, 2005

Page 3

A “Frost Day” shall be defined as a day in which one or more of the following conditions is true for a

particular location: [-as-reperted-by Earth Satellite Corperation:]

« The temperature at 0700 local time (0600 UTC, except 0500 UTC beginning the last Sunday in
March) is less than or equal to -3.5 degrees Celsius;

* The temperature at 1000 local time (0900 UTC, except 0800 UTC beginning the last Sunday in
March) is less than or equal to -1.5 degrees Celsius;

* The temperature at 0700 local time (0600 UTC, except 0500 UTC beginning the last Sunday in
March) is less than or equal to -0.5 degrees Celsius, and the temperature at 1000 local time (0900
UTC, except 0800 UTC beginning the last Sunday in March) is less than or equal to -0.5 degrees
Celsius.

2. The CME Seasonal Frost Days Indexes and Listing Cities

Each particular CME Seasonal Frost Days index is the accumulation of like Frost Days over the 5-
month period beginning the first Monday in November and ending the last Friday in March, excluding
Saturdays, Sundays, December 25, December 26, and January 1. Each particular Index _shall_be
computed by Earth Satellite Corporation using final temperature observations reported by the respective

national meteorological office.

The temperature for a particular location is reported from a specific weather station. The table below
lists the cities and their corresponding weather stations:

Listing Cities and Corresponding Weather Stations

. Amsterdam-Schiphol, Netherlands (WMO 06240)

FUTURES CALL
G. Termination of Trading

Futures trading shall terminate at 9:00 A.M. on the first Exchange business day that is at least [twe]six
calendar days after the last Friday in March.

(Remainder of Rule 41702 unchanged)

41703.

SETTLEMENT PROCEDURES
A. Final Settlement Price

All futures contracts remaining open at the termination of trading shall be settled using the respective
CME Seasonal Frost Days Index reported by Earth Satellite Corporation for that city for that contract
period, using the methodology in effect on that date, on the first Exchange business day that is at least
[twe]six calendar days after the last Friday in March. For example, on March [28]31, 2005, the March
2005 futures contract on the CME Amsterdam-Schiphol Seasonal Frost Days Index would have been
settled at 10 Frost Days.

(Remainder of Rule 41703 unchanged)