7 Tex. Admin. Code § 51.9
The provisions of this §51.9 adopted to be effective January 1, 1976; amended to be effective June 1, 1976, 1 TexReg 1481; amended to be effective May 6, 1986, 11 TexReg 1872; Amended by Texas Register, Volume 41, Number 18, April 29, 2016, TexReg 3102, eff. 5/5/2016; Repealed by Texas Register, Volume 47, Number 27, July 8, 2022, TexReg 3962, eff. 7/14/2022