Sec. 42.04. DEFENSE WHEN CONDUCT CONSISTS OF SPEECH OR OTHER EXPRESSION. (a) If conduct that would otherwise violate Section 42.01(a)(5) (Unreasonable Noise) or 42.03 (Obstructing Passageway) consists of speech or other communication, of gathering with others to hear or observe such speech or communication, or of gathering with others to picket or otherwise express in a nonviolent manner a position on social, economic, political, or religious questions, the actor must be ordered to move, disperse, or otherwise remedy the violation prior to his arrest if he has not yet intentionally harmed the interests of others which those sections seek to protect.