March 24, 2006

Ms. Jean A. Webb

Secretary Jr Ota
Commodity Futures Trading Commission

Three Lafayette Center

1155 21* Street, N.W.

Washington, D.C. 20581

Reference File # 2659.01
Rule Certification
Dear Ms. Webb:

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

- Amendments to Regulation 3909.01 and XX09.01 per the attached texts (additions
bold and underlined; deletion bracketed and struck through).

Regulations 3909.01 and XX09.01 govern contract month listings for CBOT 100 oz. Gold and
5,000 oz. Silver Options respectively. The underlying futures contracts for these products differ
from other commodity futures contracts due to the listing of “non-standard”, or serial, futures
months. The referenced amendments will clarify that serial option contracts expire into the
standard month cycle for each product rather than into the corresponding serial futures month.
Thus, the underlying futures for each 100 oz. Gold Option contract will be the nearest futures
contract in the February, April, June, August, October and December cycle. The underlying
future for each 5,000 oz. Silver Option will be the nearest futures contract in the March, May,
July, September and December cycle.

There were no opposing views concerning these amendments.

The CBOT intends to implement revised Regulation 3909.01 for 100 oz. Gold Options one day
after the Commission’s receipt of this filing and revised Regulation XX09.01 for 5,000 oz. Silver
Options with the launch of trading in that product.

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

Sincerely,

Paul J. Draths
Vice President and Secretary

b032106


Additions are bold and underlined. Deletions are [Bracketed-with-strikethrough].
CBOT® 100 oz Gold Futures Options

3909.01 Months Traded In - Trading may be conducted in the nearby Gold futures
options contract month plus any succeeding months provided however, that the Exchange may
determine not to list a contract month. All option contract months shall expire into the
nearest of the Standard s six month contract c ‘ele. fF pti Hracds thataretraded

e-fur

@ actisthe-Februa as-eontt : 06 For option contracts
traded i in February, April, June, August, October, or December, the underlying futures

contract will be the corresponding February, April, June, August, October, or
December futures contract. For serial option contracts traded in January, March, May,
July, September, or November, the underlying futures contract will be the nearest
February, April, June, August, October, or December futures contract, respectively. For
example, the underlying futures contract for a January serial option is the nearest
February futures contract.

tract-fe

CBOT® 5000 oz, Silver Futures Options

XX09.01 Months Traded In - Trading may be conducted in the nearby Silver futures
options contract month plus any succeeding months provided however, that the Exchange may

determine not to list a contract month. {Fheunderlying fuk tract ford *y-epti
3 ts-is-th tM hb tr _E 3 ts that traded +: thsi: hich

fate tract-for the February-opti tract-is-the March fut tzact} All option

contract months shall expire into the nearest of the standard five month contract cycle.
For option contracts traded in March, May, July, September or December, the underlying
futures contract will be the corresponding March, May, July, September or December
futures contract. For serial option contracts traded in January, February, April, June,
August, October or November, the underlying futures contract will be the nearest March,
May, July, September, or December futures contract, respectively. For example, the

underlying futures contract for a January serial option is the nearest March futures
contract.