Texas. Legislature. House of Representatives. 83rd Texas Legislature, Regular Session, House Bill 3211, Chapter 376, legislative document, June 14, 2013; (https://texashistory.unt.edu/ark:/67531/metapth438283/m1/1/: accessed December 18, 2018), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .