Tex. Education Code § 37.123

(a) A person commits an offense if the person, alone or in concert with others, intentionally engages in disruptive activity on the campus or property of any private or public school.

(b) For purposes of this section, disruptive activity is:

(1) obstructing or restraining the passage of persons in an exit, entrance, or hallway of a building without the authorization of the administration of the school;

(2) seizing control of a building or portion of a building to interfere with an administrative, educational, research, or other authorized activity;

(3) preventing or attempting to prevent by force or violence or the threat of force or violence a lawful assembly authorized by the school administration so that a person attempting to participate in the assembly is unable to participate due to the use of force or violence or due to a reasonable fear that force or violence is likely to occur;

(4) disrupting by force or violence or the threat of force or violence a lawful assembly in progress; or

(5) obstructing or restraining the passage of a person at an exit or entrance to the campus or property or preventing or attempting to prevent by force or violence or by threats of force or violence the ingress or egress of a person to or from the property or campus without the authorization of the administration of the school.

(c) An offense under this section is a Class B misdemeanor.

(d) Any person who is convicted the third time of violating this section is ineligible to attend any institution of higher education receiving funds from this state before the second anniversary of the third conviction.

(e) This section may not be construed to infringe on any right of free speech or expression guaranteed by the constitution of the United States or of this state.