Notice to Members

Notice No. 183
03/30/2007

New Intra-Commodity Spread Margin Rates and Tiers for Petroleum Diesel Swap Contracts

EFFECTIVE DATE: Monday, April 2, 2007 (close of business)

FUTURES CONTRACTS:

Gulf Coast Low Sulfur Diesel (LSD) Swap (LW), Gulf Coast Ultra Low Sulfur Diesel (ULSD) Swap (LY), New York Low Sulfur Diesel (LSD) Swap (YW), New York Ultra Low Sulfur Diesel (ULSD) Swap (YS), Gulf Coast Low Sulfur Diesel (LSD) Crack Spread Swap (YK), Gulf Coast ULSD Crack Spread Swap (GY), New York Low Sulfur Diesel (LSD) Crack Spread Swap (UW), New York ULSD Crack Spread Swap (YU), Up-Down Gulf Coast LSD vs. NYMEX HO Spread Swap (YL), and Up-Down Gulf Coast ULSD vs. NYMEX HO Spread Swap (LT)

CONTRACT MONTHS: All Months

Outright (Scan) Spread Tiers for LW, LY, YW, YS, YK, GY, UW, YU, YL, and LT

Tiers	*New*
1	All Months

NYMEX Division Intra-Commodity Spread Margins on LW, LY, YW, YS, YK, GY, UW, and YU

Commodity	Clearing Member / Maintenance Margin	Member Customer Initial Margin	Non-Member Customer Initial Margin
	*New*	*New*	*New*
1	$480	$528	$648

NYMEX Division Intra-Commodity Spread Margins on YL and LT

Commodity	Clearing Member / Maintenance Margin	Member Customer Initial Margin	Non-Member Customer Initial Margin
	*New*	*New*	*New*
1	$240	$264	$320

Should you have any questions or require any further information, please contact exchangeinfo@nymex.com