Not necessarily, future increases or decreases in the square footage or the tax rate could increase or decrease the amount. The County Board of Supervisors may, by majority vote, increase or decrease the tax rate. Increases to the tax rate are limited to the cumulative increases, if any, in the medical component of the Western Urban Consumer Price index (CPI). The Fiscal Year 2023-24 rate of $0.05 reflects CPI increase only up to March 2022.