July 21, 2006

Via E-Mail

Office of the Acting Secretary
Commodity Futures Trading Commission
Three Lafayette Centre

1155 21st Street, N.W.

Washington, D.C. 20581

Re: Rule Certification. NYMEX Submission 06.89: Notification of
Amendments to NYMEX Rule 6.21A, and the Addition of New
Rules 190.14B and 191.14B.

Dear Ms. Eileen A. Donovan:

The New York Mercantile Exchange ("NYMEX" or the "Exchange") is notifying the
Commodity Futures Trading Commission (““CFTC” or “Commission’”) of amendments to
NYMEX Rule 6.21A - Exchange of Futures for, or in Connection with, Swap Transactions
—and New Rules 190.14B and 191.14B — pertaining to NY MEX New York Harbor Gasoline
Blendstock (RBOB), and NYMEX New York Harbor Unleaded Regular Gasoline Futures
Contracts.

Effective with trade date Monday, July 24, 2006, Exchange of Futures for, or in
Connection with, Swap Transactions (“EFS”), will be available for NYMEX New York Harbor
Gasoline Blendstock (RBOB or “RB”), and NYMEX New York Harbor Unleaded Regular
Gasoline (“HU”) Futures Contracts. New Rules 190.14B and 191.14B have been added in
conjunction with the amendments to Rule 6.21A. As a housekeeping item, the reference to Brent
Crude Oil has been deleted from Rule 6.21A. Pursuant to Section 5c(c) of the Commodity
Exchange Act (“Act”) and CFTC Rule 40.6, the Exchange hereby certifies that the attached rule
amendments comply with the Act, including regulations under the Act.

Should you have any questions concerning the above, please contact Nancy Minett, Vice
President, Compliance, at (212) 299-2940, or the undersigned at (212) 299-2897.

Very truly yours,

Thomas F. LaSala
Senior Vice President

Compliance and Risk Management
ce: Brian Regan
Nancy Minett


(Bold/underlined indicates additions; bold/strikethrough indicates deletions.)
NYMEX Rule 6.21A - Exchange of Futures for, or in Connection with, Swap Transactions

(A) (1) An exchange of futures for, or in connection with, a swap (EFS) consists of two discrete, but
related, transactions; a swap transaction and a futures transaction. At the time such transaction is
effected, the buyer and seller of the futures must be, respectively, the seller and the buyer of the swap.
The swap component shall involve the commodity underlying the futures contract (or a derivative, by-
product or related product of such commodity). The quantity covered by the swap must be approximately
equivalent to the quantity covered by the futures contracts. The swap component of an EFS transaction
must comply with the applicable CFTC swap regulatory requirements.

(B) Eligible Contracts and Transactions.

(1) Eligible contracts shall include Natural Gas futures, Brent Crude On futures, New York Harbor

2a e e es, any
contract executed off the Exchange that the Exchange has designated 2 as eligible for clearing at the
Exchange, and any contract that is listed for trading only on NYMEX ACCESS@® or that is listed for trading
only on an Alternative Electronic Trading System. For the purposes of this rule, the term "Alternative
Electronic Trading System” shall mean any electronic trading system other than NYMEX ACCESS® on
which NYMEX Division or COMEX Division products are traded, but not including GLOBEX®.

(2) EFS transactions may be posted according to the following procedures:

(i) Natural Gas and NYMEX Brent_Crude-Oit_, New York Harbor Gasoline Blendstock (RBOB)
futures and New York Harbor Unleaded Regular Gasoline..

The posting of any Natural Gas,

or NYMEX Brent-Crude-Oil EFS transaction shall be given on the
floor of the Exchange by the Floor Members during the hours of futures trading for such contract and
otherwise in accordance with Rule 6.90. Each EFS transaction shall be posted, immediately when the
relevant swap terms are determined, but in no event later than the earlier of the next business day or the
end of the following permissible posting periods for EFS transactions (following the expiration of the
underlying futures contract):

(a) EFS transactions involving the NYMEX Brent

contract are permitted until 2:00
P.M_on the day after the close of trading on the last trading day in the expiring contract month; and

(b) EFS transactions involving the Natural Gas contract are permitted until two hours after trading
terminates on the last day of trading in the expiring contract month.

These EFS transactions will be cleared through the Exchange in accordance with normal procedures and
by the Clearing Members involved.

(Remainder of the Rule is unchanged.)


(New Rules for both HU and RB.)