Texas. Legislature. House of Representatives. 78th Texas Legislature, Regular Session, House Bill 1387, Chapter 541, legislative document, June 20, 2003; (https://texashistory.unt.edu/ark:/67531/metapth158155/m1/1/: accessed July 19, 2018), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .