The rates adopted by the Board of Public Utilities are based upon and dependent upon federal, state, county, municipal, and other government levies, including gross receipts, income taxes, license fees, and other impositions of similar character in effect as of December 31, 1963. In the event an increase in rates of existing taxes of this character or additional new taxes, licenses, or fees based upon the generation, transmission, distribution, purchase, or sale of the electric energy shall be imposed upon or required to be paid by the city, the rates adopted may be increased by a surcharge equal to the amount of the cost per kwh, or per consumer, or per demand or capacity or other applicable unit of charge for the new or additional taxes, licenses, or fees.
(1980 Code, § 52.07)