(a) A school district, open-enrollment charter school, or district or charter school employee may not provide or allow a third party to provide instruction, guidance, activities, or programming regarding sexual orientation or gender identity to students enrolled in prekindergarten through 12th grade.
(b) This section may not be construed to:
(1) limit a student's ability to engage in speech or expressive conduct protected by the First Amendment to the United States Constitution or by Section 8, Article I, Texas Constitution, that does not result in material disruption to school activities;
(2) limit the ability of a person who is authorized by the district to provide physical or mental health-related services to provide the services to a student, subject to any required parental consent; or
(3) prohibit an organization whose membership is restricted to one sex and whose mission does not advance a political or social agenda from meeting on a school district or open-enrollment charter school campus.