The tax has two parts: A gross receipts tax on electric, gas, and telephone companies; and For electric and gas companies, a tax based on the kilowatt hours of electricity or therms of natural gas delivered by the company for final consumption in the State. County and municipal utilities and nonprofit electric cooperatives are not subject to the gross receipts tax, but are subject to the tax based on kilowatt hours of electricity delivered. County and municipal utilities are not subject to the tax based on therms of natural gas delivered. An interstate natural gas pipeline is subject to both the gross receipts tax and the tax based on therms of natural gas delivered if the company delivers natural gas for final consumption to a customer in this State.