Summary: Revises Tariff No. 10, decreasing from 25 percent to 20 percent the utility tax imposed by the City of Mabton. Although the commission approved the 25 percent utility tax in Docket TG-091725, effective on December 21, 2009, the company never charged that tax to any customers because the company and the City of Mabton could not agree on which customers were subject to the tax. This filing clarifies the amount of the tax and confirms agreement between the City of Mabton and the company on the nine residential and six commercial customers who will be subject to the tax.