Gas distribution utilities shall undertake energy efficiency programs designed to operate within an annual budget upon full program implementation that is no less than 3% of the utility's annual delivery revenue. For purposes of this Chapter, delivery revenue means all revenue received by the gas distribution utility from the application of its delivery service base rates, which are exclusive of those revenues generated from the application of the utility's Cost of Gas Factor and any other tariff surcharges additional to the base rates.
95- 648 C.M.R. ch. 480, § 5