March 14, 2006

Ms. Jean A. Webb

Secretary

Commodity Futures Trading Commission

Three Lafayette Center

1155 21” Street, N.W.

Washington, D.C. 20581
Reference File #2649.01
Rule Certification

Dear Ms. Webb:

Pursuant to Commission Regulation 40.6(a), the Chicago Board of Trade (CBOT®) hereby
submits the following:

- Amendment to CBOT Rulebook Appendix 9B-3 per the attached text (additions
bold and underlined).
The referenced amendment will codify the e-cbot® “no-bust” ranges for CBOT Dow Jones
Industrial AverageTM Index ($25 Multiplier) Futures. (The Exchange’s “e-cbot Error Trade
Policy” for electronic trading, as set forth in Rulebook Appendix 9B-2, incorporates, by
reference, a “no-bust” range, as specified in Appendix 9B-3, for each electronically traded
product.)

The CBOT intends to implement this amendment concurrently with the launch of trading in the
referenced contract (scheduled for March 20, 2006).

There were no opposing views concerning this amendment.

The CBOT certifies that this amendment complies with the Commodity Exchange Act and the
rules thereunder.

Sincerely,

Paul J. Draths
Vice President and Secretary

*"Dow JonesTM, “The DowTM”, “Dow Jones Industrial AverageTM”, and “DJIA”, are service marks of Dow Jones & Company,
Inc. and have been licensed for use for certain purposes by the Board of Trade of the City of Chicago, Inc. (“CBOT®”). The
CBOT’s futures and futures options contracts based on the Dow Jones Industrial AverageTM are not sponsored, endorsed, sold or
promoted by Dow JonesTM, and Dow JonesTM makes no representation regarding the advisability of trading in such product(s).


Additions are bold and underlined.
APPENDIX 9B-3

TICK BREAKDOWN PER CBOT PRODUCT

Product =: '~ | Symbol .|" Minimum’ - No Bust. Tick Dynamic Daily
vanes oo Hick Range”* . | Increment of |. Price - Price
Increment z “No Bust. Limits Limit
fey . : Range”
U.S. T-Bond ZB 1/32 96 ticks 3 points 30/32nds N/A
U.S. T-Bond Options OZB 1/64 N/A N/A 20/64ths N/A
10 Yr. T-Note ZN (AyB2 192 ticks 3 points 15/32nds NIA
10 Yr. T-Note Options OZN 1/64 N/A N/A 20/64ths N/A
5 Yr. T-Note ZF (AY32 192 ticks 3 points 15/32nds N/A
5 Yr. T-Note Options OZF 1/64 N/A N/A 20/64ths N/A
2 Yr. T-Note ZT (Ay/32 384 ticks 3 points 7.5/32nds N/A
2 Yr. T-Note Options OZT (A64 N/A N/A 10/64ths N/A
Muni-Note Index ZU 1/32 20 ticks 20/32nds 20/32nds N/A
30-Day Fed Funds ZQ % Basis Point 20 ticks 10 Points 10 points N/A
30-Day Fed Funds OZQ '/ Basis Point N/A N/A 5 points N/A
Options
10 Yr. Interest Rate SR 1/32 20 ticks 20/32nds 20/32nds N/A
Swaps
10 Yr. Interest Rate OSR 1/64 N/A NIA 20/64ths NIA
Swaps Options
5 Yr. Interest Rate SA (AY/32 20 ticks 10/32nds 10/32nds NIA
Swaps
5 Yr. Interest Rate OSA 1/64 N/A N/A 20/64ths N/A
Swaps Options
Dow AIG Commodity Al 0.1 Points 40 ticks 4 Points 4 points N/A
Index
DJIA ($10) ZD 1 Point 250 Points 250 Points 40 points | 10%, 20%
and 30%
Circuit
Breakers
DJIA Options OZD % Point N/A N/A 20 points | 10%, 20%
and 30%
Circuit
Breakers
mini-sized Dow ($5) YM } Point 250 Points 250 Points | 40 points | 10%, 20%
and 30%
Circuit
Breakers
mini-sized Dow Options | OYM 1 Point N/A N/A 40 points 10%, 20%
and 30%
Circuit
Breakers
DJIA ($25 DD 1 Point 250 Points | 250 Points 40 points | 10%,
20% and
30%
circuit
breakers