(a) After a commission order is issued approving the assessment income needed for the next fiscal year, the executive director shall calculate assessment rates for water use and storage based on the following formula:      
        Attached Graphic       
      (b) After the assessment rate of municipal use has been determined, the assessment rates for the other uses and for storage shall be calculated by multiplying the municipal assessment rate times rate factor for each use and for storage.     
      (c) On or before September 1, 1989, the commission shall review this section for any appropriate changes.     
     Source Note:        The provisions of this §303.72 adopted to be effective August 26, 1987, 12 TexReg 2684; amended to be effective October 26, 2006, 31 TexReg 8716