September 20, 2006 eon .

Ms. Eileen A. Donovan - -
Acting Secretary MEM
Commodity Futures Trading Commission

Three Lafayette Center

1155 21" Street, N.W.

Washington, D.C. 20581

Reference File # 2722.01
Rule Certification
Dear Ms. Donovan:

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

- Amendments to Rulebook Appendix 9B-3 per the attached text (additions
underlined; deletions bracketed and struck through).

The referenced amendments will increase dynamic price limits for CBOT Ethanol futures on the
e-cbot® electronic platforms as follows:

- From 4 cents to 12 cents (9:45 a.m. to 1:15 p.m.);

- From 8 cents to 16 cents for overnight hours and during the pre-open period; and

- From 4 cents to 6 cents for spreads.
These changes are consistent with a recent Exchange action (implemented July 24, 2006) which
increased the daily price limits from $.15 to $.30 per gallon for Ethanol futures. By increasing
the dynamic price limits, there will be a broader range of acceptable prices that can be submitted
in orders into the e-cbot system.
The CBOT intends to implement these amendments as of trade date September 25, 2006.

There were no opposing views concerning these amendments.

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

Sincerely,

Paul J. Draths
Vice President and Secretary

6091906



Additions are bold and underlined; deletions are bracketed and struck through.

Appendix 9B-3

TICK BREAKDOWN PER CBOT PRODUCT

Product | Symbol | Minimum “No Tick Price Dynamic Daily Dynamic Price Daily
Tick Adjust | increment | Adjustment Price Price Limits(Spreads) | Price
Increment | Range”* | of “No Level Limits Limit Limit
Adjust (Overnight (Post
Range” and 9:45AM)
8:30AM-
9:45AM)
100 oz. ZG 10 cents $4.00 40 ticks Reference $4.00 NIA $4.00 N/A
Gold price
plus/minus 40
ticks
mini-sized YG 10 cents $4.00 40 ticks Reference $4.00 N/A $4.00 N/A
Gold price
plus/minus 40
ticks
5.000 oz val 10 cent 8 cents 80 ticks Reference 8 cents N/A 8 cents NIA
Silver plus/minus 80
ticks
mini-sized yI Widcent | Scents | 8Oticks | Reference 8 cents N/A 8 cents N/A
Silver pee
plus/minus 80
ticks
Ethanol ZE W0cent | 8 cents 80 ticks Reference fReents} | f4-cenis] [eents} 30
cents
plus/minus 40 16 cents 12 cents 6 cents
ticks
Corn zc Ye cent 10 cents 40 ticks mee 10 cents 5 cents 2% cents 20
plus/minus 20 cents
ticks
Com ozc 1/8 cent NIA N/A hare 2% cents 2 Yscents 2 cents 20
Options above offer cents
Wheat zw % cent 10 cents 40 ticks Reference 10 cents 5 cents 2 ecents 30
plus/minus 20 cents
ticks
Wheat ozw 1/8 cent N/A NIA hick below 2¥cents | 2%cents 2% cents 30
Options above offer cents
Oat zo % cent 10 cents 40 ticks ween 10 cents 10 cents 10 cents 20
plus/minus 40 cents
ticks
Oat 0zo 1/8 cent NIA NIA bak below 2% cents 2 %cents 2 cents 20
Options above offer cents
Rough ZR % cent 20cents | 40 ticks Reference 20 cents 20 cents 20 cents 50
Rice price cents:
plus/minus 40
ticks



1 tick below

Rough OzR Ya cent
Rive en NA NIA bid/I tick 5 cents 5 cents 5 cents 50
Options above offer cents
South ZK " ‘ Reference
South % cent 20 cents 80 ticks | ce 20 cents 10 cents 5 cents 50
Soybeans plus/minus 40 cents
b- — ticks
Reference
Soybeans zs % price
Ya cent 10 cents 40 ticks plus/minus 20 20 cents O cents Scents 50
ticks cents
Soybean ozs 1/8 cent N/A 1 tick below
Options Nia bid/I tick Scents 5 cents 5 cents 50
above offer cents
Soybean ZM 10 cents $8.00 0 Reference
Mea! BOticks | price $8.00 $4.00 $2.00 $20
plus/minus 40
ticks
Soybean OzM 5 cents NIA 7 I tick below
Meal NA bid/I tick $2.00 $2.00 $2.00 $20
Options above offer
Soybean ZL r ‘e Reference
Soy 1100cents | #0cents | 80ticks | Feo .80 cents 40 cents 20 cents 2
plus/minus 40 cents
ticks
Soybean OZL | 5/1000 cent: q | tick below
be cents | N/A NIA big tek 20 cents 20 cents .20 cents 2
above offer cents

Options