Section R884-24P-58 - One-Time Decrease in Certified Rate Based on Estimated County Option Sales Tax Pursuant to Utah Code Ann. Section 59-2-924A. The estimated sales tax revenue to be distributed to a county under Section 59-12-1102 shall be determined based on the following formula:1. sharedown of the commission's sales tax econometric model based on historic patterns, weighted 40 percent;2. time series models, weighted 40 percent; and3. growth rate of actual taxable sales occurring from January 1 through March 31 of the year a tax is initially imposed under Title 59, Chapter 12, Part 11, County Option Sales and Use Tax, weighted 20 percent.Utah Admin. Code R884-24P-58