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          AN ACT
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        relating to a requirement that the Texas Commission on  | 
      
      
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        Environmental Quality obtain or develop updated water availability  | 
      
      
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        models for certain river basins. | 
      
      
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               BE IT ENACTED BY THE LEGISLATURE OF THE STATE OF TEXAS: | 
      
      
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               SECTION 1.  Section 16.012, Water Code, is amended by adding  | 
      
      
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        Subsection (h-1) to read as follows: | 
      
      
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               (h-1)  Not later than December 1, 2022, the commission shall  | 
      
      
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        obtain or develop updated water availability models for the Brazos  | 
      
      
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        River, Neches River, Red River, and Rio Grande river basins.  The  | 
      
      
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        commission may collect data from all jurisdictions that allocate  | 
      
      
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        the waters of the rivers, including jurisdictions outside this  | 
      
      
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        state.  This subsection expires September 1, 2023. | 
      
      
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               SECTION 2.  The Texas Commission on Environmental Quality is  | 
      
      
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        required to implement a provision of this Act only if the  | 
      
      
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        legislature appropriates money specifically for that purpose.  If  | 
      
      
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        the legislature does not appropriate money specifically for that  | 
      
      
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        purpose, the commission may, but is not required to, implement a  | 
      
      
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        provision of this Act using other appropriations available for that  | 
      
      
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        purpose. | 
      
      
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               SECTION 3.  This Act takes effect September 1, 2019. | 
      
      
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        ______________________________ | 
        ______________________________ | 
      
      
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           President of the Senate | 
        Speaker of the House      | 
      
      
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               I certify that H.B. No. 723 was passed by the House on April  | 
      
      
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        10, 2019, by the following vote:  Yeas 145, Nays 1, 1 present, not  | 
      
      
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        voting; and that the House concurred in Senate amendments to H.B.  | 
      
      
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        No. 723 on May 10, 2019, by the following vote:  Yeas 106, Nays 0, 1  | 
      
      
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        present, not voting. | 
      
      
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        ______________________________ | 
      
      
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        Chief Clerk of the House    | 
      
      
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               I certify that H.B. No. 723 was passed by the Senate, with  | 
      
      
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        amendments, on May 1, 2019, by the following vote:  Yeas 31, Nays 0. | 
      
      
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        ______________________________ | 
      
      
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        Secretary of the Senate    | 
      
      
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        APPROVED: __________________ | 
      
      
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                        Date        | 
      
      
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                 __________________ | 
      
      
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                      Governor        |