Texas. Legislature. Senate. 80th Texas Legislature, Regular Session, Senate Bill 1074, Chapter 89, legislative document, May 14, 2007; (https://texashistory.unt.edu/ark:/67531/metapth155590/m1/1/: accessed March 19, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .

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