34 Tex. Admin. Code § 25.10
A person employed in a Texas public college or university is not eligible for membership based upon that employment, will not have deductions made from compensation for that employment, and will not receive service credit for that employment if both the following conditions apply:
Source Note:The provisions of this §25.10 adopted to be effective January 1, 1976; amended to be effective September 11, 1977, 2 TexReg 3277.