42 Pa.C.S. § 8340.15
(1) The party asserting the cause of action based on protected public expression fails to:
A person is immune from civil liability for a cause of action based on protected public expression if any of the following paragraphs apply:
Cross References. Section 8340.15 is referred to in sections 8320.1, 8340.13, 8340.16, 8340.18 of this title.