Mo. Rev. Stat. § 292.200: Offenses.

It shall be unlawful and deemed a violation of sections 292.010 to 292.250 for any person to break, remove, alter or otherwise render ineffective, or to aid or abet or cause the same to be done, any guards installed, or the seal of any inspector affixed in accordance with the provisions of sections 292.010 to 292.250.