Each monthly bill for residential and commercial gas service shall be adjusted for changes in the cost of providing such service as follows:
(A) Effective with bills rendered for the month of May, 1985 and annually effective each May there-after, the residential and commercial monthly rate shall be adjusted for changes in the cost per customer of providing gas service (including depreciation but excluding cost of gas, gross receipts taxes, income taxes, and return) for the previous year ended December 31 above or below such cost incurred in the second prior calendar year. These annual adjustments shall be cumulative. The operating expenses used in calculating the adjustments shall be for the applicable distribution system as reported to the Railroad Commission of Texas in the annual report of Lone Star Gas Company. Should the percentage change in cost of service per customer of providing gas service exceed the rate of change in the Implicit Price Deflator of the Gross National Product over the same period of time, the adjustment will be limited to a maximum change computed by multiplying the cost of service per customer of providing gas service in the second prior calendar year ended December 31 by the rate of change in the Implicit Price Deflator of the Gross National Product. The adjustment per bill shall be rounded to the nearest whole cent.
(B) The adjustment determined by division (A) of this section shall be multiplied by the same tax factor used in calculating the gas cost adjustment contained herein to include street and alley rental and state occupation tax due to increasing or decreasing company revenues under this cost of service adjustment provision.
(Ord. 67-6, passed 9-12-67; Am. Ord. 81-02, passed 4-29-81; Am. Ord. 83-06, passed 6-23-83; Am. Ord. 85-01, passed 2-12-85)