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February 22, 2007
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 07.32: Notification of 5 3
Amendments to NYMEX Rule 6.21C, Block Trades, and Deletion
of NYMEX Rule 6.21B, Inter-exchange Arbitrage Transactions.

Dear Ms. Eileen 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 6.21C, Block Trades, and deletion of NYMEX Rule 6.21B, Inter-exchange
Arbitrage Transactions.

Effective February 26, 2007, NYMEX Rule 6.21C, “Block Trades,” is being amended to
include NYMEX “core” energy Futures Contracts, namely Crude Oil (CL), Heating Oil (HO),
New York Harbor Gasoline Blendstock (RB), and Natural Gas (NG). The rule amendments will
allow for the submission of a Block Trade with a minimum quantity of 200 lots in CL and 100
lots in HO, RB and NG to the NYMEX Customer Service Desk (“NCS”) via a fax submission in
a similar fashion to what was previously implemented for the CL-BB spread and NYMEX Soft
contracts or via the trading floor. In addition, activity previously conducted pursuant to Rule
6.21A in CL will now be handled pursuant to the Block Trading rules.

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.

If you have any questions, please contact Nancy Minett, Vice President, Compliance, at
(212) 299-2940, or myself at (212) 299-2897.

Sincerely,

Thomas F. LaSala
Chief Regulatory Officer
cc: Brian Regan
Nancy Minett


Rule 6.21C, Block Trades

(A) Block trades (privately negotiated transactions) shall be permitted in such Exchange products, and
for such minimum threshold quantities and under other such conditions as are listed in paragraph (B) of
this Rule 6.21C. The following shall govern block trades:

(1) A block trade must be for a quantity that is at or in excess of the applicable minimum threshold.
Orders from different accounts may not be aggregated in order to meet the minimum threshold, except in
connection with the activities of a registered commodity trading advisor or foreign person performing a
similar role, as described in Paragraphs 8 and 9, below.

(2) Each party to a block trade must be an Eligible Contract Participant as that term is defined in Section
1a(12) of the Commodity Exchange Act.

(3) A member shall not execute any order by means of a block trade for a customer unless such customer
has specified that the order be executed as a block trade.

(4) The price at which a block trade is executed must be fair and reasonable in light of (i) the size of the
block trade, (ii) the prices and sizes of other transactions in the same contract at the relevant time, (iii)
the prices and sizes of transactions in other relevant markets, including without limitation the underlying
cash and futures markets, at the relevant time, and (iv) the circumstances of the markets or the parties to
the block trade.

(5) Block trades shall not set off conditional orders (e.g., Stop Orders and MIT Orders) or otherwise
affect orders in the regular market.

(6) The buyer and seller must ensure that each block trade is reported to the Exchange within five
minutes of the time of execution. The block trade must be submitted in accordance with procedures
prescribed by the Exchange. The Exchange shall promptly publish such information separately from the
reports of transactions in the regular market.

(7) Clearing members and members involved in the execution of block trades must maintain a complete
record of the transaction in accordance with Exchange Rule 8.50.

(8) A commodity trading advisor ("CTA") registered or exempt from registration under the Act,
including, without limitation, any investment advisor registered or exempt from registration under the
Investment Advisors Act of 1940, shall be the applicable entity for purposes of Paragraphs 1, 2, 3, and 4,
provided such advisors have total assets under management exceeding $25 million and the block trade is
suitable for the customers of such advisors.

(9) A foreign Person performing a similar role or function to a CTA or investment advisor as described
in Section I, and subject as such to foreign regulation, shall be the applicable entity for purposes of
Paragraphs 1, 2, 3, and 4, provided such Persons have total assets under management exceeding $25
million and the block trade is suitable for the customers of such Persons.

(B) Block trades shall be permitted in accordance with this Rule 6.21C in the following Exchange
products, under the conditions described:

(1) Spreads transactions between the Light Sweet Crude Oil (CL) and the Brent Crude Oil — Financial
(BB) futures contracts, for a threshold minimum quantity of 50 contracts in each leg of the spread.


(2) Transactions in NYMEX Soft Futures Contracts: NYMEX Cocoa (CJ), NYMEX Coffee (KT),
NYMEX Cotton (TT), NYMEX FCOI (FJ), NYMEX Sugar 11 (YO) and NYMEX Sugar 14 (FT), for a
threshold minimum quantity of 100 contracts.

(3) Light Sweet Crude Oil futures (CL), for a threshold minimum quantity of 200 contracts;
(4) Natural Gas futures (NG), for a threshold minimum quantity of 100 contracts;
(5) Heating Oil futures (HO), for a threshold minimum quantity of 100 contracts; and

6) New York Harbor RBOB Gasoline futures for a threshold minimum quantity of 100
contracts.

tater-Exchange Arbitrage Trade transactions are permitted, These-designated-contracts-and-thei
sponding minimunt-size thresholds and_other conditions are listed in section (C) below.