08/17/2006
This extension of months will apply to the contracts below:
| Natural Gas Basis Contract Name | Symbol |
| Houston Ship Channel Basis Swap (Platts IFERC) | NH |
| Alberta Basis Swap (CGPR) | NA |
| SoCal Basis Swap (NGI) | NS |
| Panhandle Basis Swap (Platts IFERC) | PH |
| NW Pipeline, Rockies Basis Swap (Platts IFERC) | NR |
| Texas Eastern M-3 Basis Swap (Platts IFERC) | NX |
| Dominion Trans. Appalachia (Platts IFERC) | PG |
| NGPL Tex/Ok Basis Swap (Platts IFERC) | PD |
| Chicago Basis Swap (NGI) | NB |
| Malin Basis Swap (NGI) | PB |
| Waha Basis Swap (Platts IFERC) | NW |
| Columbia Gas Transmission Corp. Appalachia Basis Swap (Platts IFERC) | TC |
| MichCon Basis Swap (Platts IFERC) | NF |
| Henry Hub Basis Swap (Platts IFERC) | HB |
| Pacific Gas & Electric (PG&E) Citygate Basis Swap (NGI) | PC |
| NGPL Mid-Continent Basis Swap (Platts IFERC) | NL |
| CIG Basis Swap (Platts IFERC) | CI |
| Transco Z6 Basis Swap (Platts IFERC) | NZ |
| Permian Basis Swap (Platts IFERC) | PM |
| Northern Natural Gas Ventura, Iowa Basis Swap (Platts IFERC) | PF |
| Sumas Basis Swap (Platts IFERC) | NK |
| San Juan Basis Swap (Platts IFERC) | NJ |
| TENN-ZONE 0 Basis Swap (Platts IFERC) | NQ |
| Northern Natural Gas Demarcation Basis Swap (Platts IFERC) | PE |
| ANR Oklahoma Basis Swap (Platts IFERC) | NE |
| TETCO South Texas Basis Swap (Platts IFERC) | TX |
| Transco Z3 Basis Swap (Platts IFERC) | CZ |
| Columbia Gulf Transmission Onshore Basis Swap (Platts IFERC) | GL |
| Centerpoint Basis (Plastts IFERC) Futures Contract | PW |
| Texas Gas,SL Basis Swap (Platts IFERC) | TB |
| ANR,Louisiana Basis Futures Contract Swap (Platts IFERC) | ND |
| SONAT Basis Swap Futures (Platts IFERC) | SZ |