(a) In this section, "disciplinary proceeding" has the meaning assigned by Section 22.0512.
(b) A classroom teacher employed by a school district may not be subject to disciplinary proceedings for an allegation that the teacher violated Section 28.0022, the Establishment Clause of the First Amendment of the United States Constitution, or a related state or federal law if:
(1) the teacher used only instructional material included on the list of approved instructional material maintained by the State Board of Education under Section 31.022 and adopted by the district; and
(2) the allegation does not dispute that the teacher delivered instruction from instructional material described by Subdivision (1) with fidelity.
(c) The immunity provided by Subsection (b) is in addition to any other immunity provided by law. This section may not be construed to interfere with any other immunity provided by law.