The power is hereby vested in the governing body of any city or town in the State of Oklahoma to levy and assess, by ordinance, an annual tax upon the gross receipts from residential and commercial sales of power, light, heat, gas, electricity or water in said city or town in an amount not exceeding two percent (2%) of the gross receipts from residential and commercial sales, which tax shall be in lieu of any other franchise, license, occupation or excise tax, levied by such city or town.
Okla. Stat. tit. 68, § 2601