February 16, 2007

Ms. Eileen A. Donovan : o
Acting Secretary
Commodity Futures Trading Commission
Three Lafayette Center
1155 21* Street, N.W. :
Washington, D.C. 20581 ~
Reference File #2767.01
Rule Certification

Dear Ms. Donovan:

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

- Amendments to CBOT Rulebook Appendix 9B-3 per the attached text (additions
bolded).

The referenced amendments will codify the e-cbot® “no-bust” range for CBOT Dow JonesTM US
Real Estate Index 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 these amendments no sooner than one day after the
Commission’s receipt of this filing.

There were no opposing views concerning these amendments.

The CBOT certifies that these amendments comply with the Commodity Exchange Act and the
tules thereunder.

Sincerely,

Paul J. Draths
Vice President and Secretary

*’Dow JonesTM, is a service mark of Dow Jones & Company, Inc, and has been licensed for use for certain purposes by the Board
of Trade of the City of Chicago, Inc. (*CBOT®TM). The CBOT’s futures contract based on the Dow Jones U.S. Real Estate Index
are not sponsored, endorsed, sold or promoted by Dow JonesTM, and Dow JonesTM makes no representation regarding the
advisability of trading in such product.


APPENDIX 9B-3
TICK BREAKDOWN PER CBOT PRODUCT

1/32 3 points 96 ticks 0/32nds N/A
U.S. T-Bond Options OZB 1/64 NA N/A 20/64ths N/A
10 Yr. T-Note ZN (Ay/32 3 points 192 ticks 15/32nds N/A
10 Yr. T-Note Options OZN 1/64 N/A N/A 20/64ths N/A
5 Yr. T-Note ZF (“y/32 3 points 192 ticks 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 (4/32 3 points 384 ticks 7.5/32nds N/A
2 Yr. T-Note Options OZT. (A/64 N/A N/A 10/64ths N/A
30-Day Fed Funds ZQ 4 Basis Point 10 Points 20 ticks 10 points N/A
30-Day Fed Funds 0ZQ % Basis Point N/A N/A 5 points N/A
Options
Binary Fed Funds BUS 1 point NIA NIA N/A NIA
Options
10 Yr. Interest Rate SR 1/32 20/32nds 20 ticks 20/32nds N/A
Swaps
10 Yr. Interest Rate OSR 1/64 N/A N/A 20/64ths N/A
Swaps Options
5 Yr. Interest Rate SA (AY/32 10/32nds 20 ticks 10/32nds N/A
Swaps
5 Yr. Interest Rate OSA 1/64 N/A N/A 20/64ths N/A
Swaps Options
Dow AIG-ER ER 0.1 Points 4 Points 40 ticks 4 points N/A
Commodity 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 1 Point 250 Points 250 Points 40 points | 10%, 20%
and 30%
Circuit
Breakers
mini-sized Dow Options | OYM 1 Point N/A NIA 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
Dow US Real Estate RE 0.1 Points 4 Points 40 ticks 4 points 10%,
Index 20% and
30%
Circuit
Breakers
mini-sized Eurodollar YE Y, basis point 5 points 10 ticks 5 points N/A
100 02. Gold Options OZG 10 cents NA N/A $2.00 N/A
5,000 oz. Silver Options | OZI 1/10-cent N/A N/A 4 cents N/A