Texas. Legislature. House of Representatives. 85th Texas Legislature, Regular Session, House Bill 1780, Chapter 152, legislative document, May 26, 2017; (https://texashistory.unt.edu/ark:/67531/metapth1050347/m1/1/: accessed February 20, 2020), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .