Texas. Legislature. House of Representatives. 82nd Texas Legislature, Regular Session, House Bill 1112, Chapter 1279, legislative document, June 17, 2011; (https://texashistory.unt.edu/ark:/67531/metapth310945/m1/1/: accessed April 19, 2019), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .