The term "criminal syndicalism," as used in this section, is hereby defined as any doctrine or precept advocating, teaching or aiding and abetting the commission of crime, sabotage or unlawful acts of force and violence or unlawful methods of terrorism as a means of accomplishing a change in industrial ownership or control or affecting any political change. The term "sabotage" is hereby defined as meaning willful and malicious physical damage or injury to physical property.
(1953 Code, ch. 18, ยง 6)