April 18, 2007

Ms. Eileen A. Donovan

Acting Secretary

Commodity Futures Trading Commission
Three Lafayette Center

1155 21* Street, N.W.

Washington, D.C. 20581

Reference File # 2785.01
Rule Certification
Dear Ms. Donovan:

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

- Amendments to Regulations 4704.01, 4904.01 and 5104.01 per the attached texts
(additions boldfaced and underlined; deletions bracketed and struck through).

The referenced regulations define the trading unit for CBOT 30-Year, 10-Year and 5-Year
Interest Rate Swap futures respectively. The referenced amendments are needed to recognize
trademark and service mark designations pertaining to ISDA.

The CBOT intends to implement these amendments one day after the Commission’s receipt of
this submission.

There were no opposing views concerning these amendments.

The CBOT certifies that these amendments comply with the Commodity Exchange Act and the
rules thereunder.
Sincerely,

Paul J. Draths
Vice President and Secretary
6041707


Additions are boldfaced and underlined. Deletions are bracketed and struck through.

4704.01 Unit of Trading

The unit of trading shall be the notional price of the fixed-rate side of a 30-year interest rate swap
that has notional principal equal to $100,000, and that exchanges semiannual interest payments
at a fixed rate of 6% per annum, measured according to a 30/360 daycount convention, for
floating interest rate payments, based on the 3-month London interbank offered rate (hereafter,
LIBOR) and measured according to an actual/360 daycount convention, and that otherwise

conforms t to the terms prescribed by the tntornational Swap and Derivatives Association;

pst LISDA? r the purpose of. computing the daily
fixing of ISDA Benchmark Rates** for US dollar interest rate swaps. (ISDA is a
registered trademark, and ISDAFIXTM is a registered service mark, of the International
Swaps and Derivatives Association, Inc.)

4904.01 Unit of Trading
The unit of trading shall be the notional price of the fixed-rate side of a 10-year interest rate swap
that has notional principal equal to $100,000, and that exchanges semiannual interest payments
at a fixed rate of 6% per annum, measured according to a 30/360 daycount convention, for
floating interest rate payments, based on the 3-month London interbank offered rate (hereafter,
LIBOR) and measured according to an actual/360 daycount convention, and that otherwise
conforms to the terms prescribed by [the International Swap and Derivatives Association;
He: ISD 8 purpe d
Rates for US, dollar interest rate swapel ISDA® for the purpose of computing the daily
fixing of ISDA Benchmark Rates** for US dollar interest rate swaps. (ISDA~ is a

registered trademark, and ISDAFIXTM is a registered service mark, of the International
Swaps and Derivatives Association, Inc.

5104.01 Unit of Trading

The unit of trading shall be the notional price of the fixed-rate side of a 5-year interest rate swap
that has notional principal equal to $100,000, and that exchanges semiannual interest payments
at a fixed rate of 6% per annum, measured according to a 30/360 daycount convention, for
floating interest rate payments, based on the 3-month London interbank offered rate (hereafter,
LIBOR) and measured according to an actual/360 daycount convention, and that otherwise

conforms to the terms prescribed by [the-tnt tional Swap-and Derivatives-A tien;
I Hh Ft ES DaS-h +h. tz tis thed iy fixi & fISDA-B. J: oF

Pr Ls
Rates for U-S,-dollar interest rate swaps} ISDA: ISDA2 for the purpose of computing t the daily
fixing of ISDA Benchmark Rates** for US dollar interest rate swaps. (ISDA~ isa

registered trademark, and ISDAFIXTM is a registered service mark, of the International
Swaps and Derivatives Association, Inc.)