CERTAIN WATER USE FEES PERMITTED.

(a) Each year the board may assess against the City of Austin a water use fee in an amount not to exceed 60 percent of the total funding the district expects to receive for the next fiscal year from water use fees assessed against Austin and other nonexempt users in that year, subject to the computation under Subsection (b).

(b) For purposes of computing water use fees under this section, the district shall estimate the amount of permitted pumpage for the next fiscal year by considering various factors including historical growth rates, future growth rates, the amount of permitted pumpage, historical permitted pumpage, and any pending applications for permitted pumpage. The district shall use the estimated amount of permitted pumpage and its water use fee rate to compute the water use fee to be assessed against the City of Austin for the district's next fiscal year. The district shall compute the water use fee assessed against the City of Austin at a rate of 17 cents per thousand gallons for the total amount of water permitted for any nonagricultural purpose, regardless of the rate actually imposed on or remitted by the permittee.