This act establishes the "Uniform Public Expression Protection Act". Currently, any action against a person for conduct or speech undertaken or made in connection with a public hearing or meeting in a quasi-judicial proceeding before a tribunal or decision-making body of the state or a political subdivision thereof is subject to a special motion to dismiss, a motion for judgment on the pleadings, or motion for summary judgment and any such motion shall be considered by the court on a priority or expedited basis. This act repeals this provision and creates procedures for dismissal of causes of action asserted in a civil action based on a person's: (1) Communication in a legislative, executive, judicial, administrative, or other governmental proceeding; (2) Communication on an issue under consideration or review in a legislative, executive, judicial, administrative, or other governmental proceeding; or (3) Exercise of the right of freedom of speech or of the press, the right to assemble or petition, or the right of association, guaranteed by the United States Constitution or the Missouri Constitution, on a matter of public concern.