September 21, 2006
Via E-Mail

Office of the Secretariat

Commodity Futures Trading Commission
Three Lafayette Centre

1155 21st Street, N.W.

Washington, D.C. 20581

Re: Rule Certification. NYMEX Submission 06.108: Notification of
Copper Spot Month Position Limit Increase [Rule 104.47(b)], and
Accompanying Amendment to Rule 9.27.

Dear Ms. Jean Webb:

The New York Mercantile Exchange ("NY MEX" or the "Exchange") is notifying the
Commodity Futures Trading Commission (“CFTC” or “Commission”) of the COMEX Division
Copper Futures contract spot month position limit change to 250 contracts.

In accordance with procedures described in Exchange Rule 104.47(b), the Control
Committee has determined to increase the Copper Futures spot month position limit from its
present level of 175 contracts to 250 contracts effective the close of business Thursday,
September 28, 2006. Exchange Notice to Members No. 06-507 dated September 21, 2006, to be
distributed after the close of the Copper market today, is attached. Also, Rule 9.27, Expiration
and Current Delivery Month Position Limits or Position Accountability (Appendix A), has been
amended accordingly. Pursuant to Section 5c(c) of the Commodity Exchange Act (“Act”) and
CFTC Rule 40.6, the Exchange hereby certifies that the attached notification and rule amendment
comply with the Act, including regulations under the Act.

Should you have any questions concerning the above, please contact Anthony V.
Densieski, Senior Director, Market Surveillance, at (212) 299-2881, Nancy Minett, Vice
President, Compliance, at (212) 299-2940, or the undersigned at (212) 299-2207.

Very truly yours,

Thomas LaSala
Senior Vice President
Compliance and Risk Management

ce: Nancy Minett
Anthony Densieski
Brian Regan



Rule 104.47 - Position Limits

Section (a) is unchanged.

(b) Applicable Limits. The maximum number of futures contracts, options on such futures contracts, or any
combination thereof (collectively referred to as a "position") which any person may own or contro! is as follows:

Commodity Spot Month Net Limit* Any One Month/All Months Net Futures Equivalent Limit
Gold 3,000 Subject to Position Accountability
Silver 1,500 Subject to Position Accountability
Aluminum 750°* Subject to Position Accountability
Copper 3,000°** Subject to Position Accountability

*Effective as of the close of business on the second last business day of the calendar month preceding the delivery
month.

**To the extent that for a period of three consecutive trading days, there is either: (1) a backwardation of price
between the first month and next most active month (first month’s price above nearest active month's price); or (2)
registered stocks which fall below 5,000 contract equivalents, the limits in place for the first month shall be reduced
to 350 contracts at the close of business three trading days later unless decided otherwise by the Control
Committee.

“If at any time registered stocks fall below 20,000 contract equivalents, the limits in place may be reduced below
3,000 contracts at the discretion of the Control Committee at the close of business three trading days later unless
decided otherwise by the Control Committee.

(Remainder of the Rule is unchanged.)

Rule 9.27 — Appendix A

(Strikethrough in bold indicates deletion; underlining in bold indicates addition.)

Contract Name Rule Commodity | All/AnyOne Month | Expiration Reporting

Chapter Code Accountability Month Level Aggregate | Aggregate
Level Limit Into (1) Into (2)
Rule 9.26 Rule 9.27 Rule 9.34
Metals
COMEX Division-
Copper Contract

Rules 111 HG 5,000 475 250 25 HG



Notice No. 06-507
September 21, 2006

TO: All Exchange Members, Member Firms and Clearing Members
FROM: James E. Newsome, President
RE: COMEX Spot Month Copper Position Limit Increase

Based on the current COMEX Copper warehouse stocks and pursuant to Exchange Rule
104.47(b), the Control Committee has decided to increase the copper futures spot month position
limit from 175 contracts to 250 contracts, effective the close of business Thursday, September
28, 2006.

Should you have any questions, please contact Anthony V. Densieski, Senior Director, Market
Surveillance, at (212) 299-2881 or Bonnie H. Yurga, Director, Market Surveillance, at (212)
299-2879.