Price Index Reference

SYMBOL	SHORT NAME	NAME	REGION	PUBLISHER
IGBDU21	GD-MP-NNG-VENT	Northern, Ventura	Others	Platts
IGBCW21	GD-MP-VIKING-EMER	Emerson Viking GL	Canadian Gas	Platts
IGBCW03	IF-EMERSON-VIK	Emerson, Viking - GL		iFERC

The subscription to each index renews on an annual basis and will continue until further notice. In the event a price is not published for a specific point and the index-based formula cannot be computed, the pipeline company will invoice the release according to NAESB 5.2.5.