Texas. Legislature. House of Representatives. 78th Texas Legislature, Regular Session, House Bill 1798, Chapter 260, legislative document, October 28, 2003; (https://texashistory.unt.edu/ark:/67531/metapth158272/m1/1/: accessed November 17, 2018), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .