Texas. Legislature. House of Representatives. 84th Texas Legislature, Regular Session, House Bill 2339, Chapter 409, legislative document, June 10, 2015; (https://texashistory.unt.edu/ark:/67531/metapth704891/m1/1/: accessed July 17, 2018), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .