Texas. Legislature. Senate. 85th Texas Legislature, Regular Session, Senate Bill 1171, Chapter 105, legislative document, May 23, 2017; (https://texashistory.unt.edu/ark:/67531/metapth1049668/m1/1/: accessed May 24, 2019), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .