25 Tex. Admin. Code § 97.67
Section 97.63 of this title (relating to Required Immunizations) states that serologic confirmation of immunity to measles, rubella, mumps, or hepatitis B are acceptable in lieu of vaccine against the serologically confirmed disease. If a child or student is unable to submit serological proof of immunity or serologic evidence of infection, then measles, rubella, mumps, or hepatitis B vaccine is required. Evidence of measles, rubella, mumps, or hepatitis B illnesses must consist of a laboratory report indicating confirmation of immunity or confirmation of infection. A copy of the report must be attached to the child's or student's immunization record, and the original should be returned to the child/student or the child's/student's parent or guardian.
Source Note:The provisions of this §97.67 adopted to be effective September 1, 1978, 3 TexReg 2145; amended to be effective September 1, 1981, 6 TexReg 3007; amended to be effective September 1, 1982, 7 TexReg 18; amended to be effective July 23, 1990, 15 TexReg 3853; amended to be effective June 27, 1995, 20 TexReg 4344; amended to be effective April 28, 1997, 22 TexReg 3521.