MO Rev Stat § 569.086 (2021)
2021 Missouri Revised Statutes|Title XXXVIII - Crimes and Punishment; Peace Officers and Public Defenders|Chapter 569 - Arson, Burglary, Trespass, and Related Offenses|Section 569.086 - Trespass on a critical infrastructure facility — penalty.

Effective - 28 Aug 2019   569.086. Trespass on a critical infrastructure facility — penalty. — 1. As used in this section, "critical infrastructure facility" means any of the following facilities that are under construction or operational: a petroleum or alumina refinery; critical electric infrastructure, as defined in 18 CFR Section 118.113(c)(3) including, but not limited to, an electrical power generating facility, substation, switching station, electrical control center, or electric power lines and associated equipment infrastructure; a chemical, polymer, or rubber manufacturing facility; a water intake structure, water storage facility, water treatment facility, wastewater treatment plant, wastewater pumping facility, or pump station; a natural gas compressor station; a liquid natural gas terminal or storage facility; a telecommunications central switching office; wireless telecommunications infrastructure, including cell towers, telephone poles and lines, including fiber optic lines; a port, railroad switching yard, railroad tracks, trucking terminal, or other freight transportation facility; a gas processing plant, including a plant used in the processing, treatment, or fractionation of natural gas or natural gas liquids; a transmission facility used by a federally licensed radio or television station; a steelmaking facility that uses an electric arc furnace to make steel; a facility identified and regulated by the United States Department of Homeland Security Chemical Facility Anti-Terrorism Standards (CFATS) program; a dam that is regulated by the state or federal government; a natural gas distribution utility facility including, but not limited to, natural gas distribution and transmission mains and services, pipeline interconnections, a city gate or town border station, metering station, aboveground piping, a regulator station, and a natural gas storage facility; a crude oil or refined products storage and distribution facility including, but not limited to, valve sites, pipeline interconnection, pump station, metering station, below or aboveground pipeline or piping and truck loading or offloading facility, a grain mill or processing facility; a generation, transmission, or distribution system of broadband internet access; or any aboveground portion of an oil, gas, hazardous liquid or chemical pipeline, tank, railroad facility, or other storage facility that is enclosed by a fence, other physical barrier, or is clearly marked with signs prohibiting trespassing, that are obviously designed to exclude intruders.  2. A person commits the offense of trespass on a critical infrastructure facility if he or she purposely trespasses or enters property containing a critical infrastructure facility without the permission of the owner of the property or lawful occupant thereof. The offense of trespass on a critical infrastructure facility is a class B misdemeanor. If it is determined that the intent of the trespasser is to damage, destroy, or tamper with equipment, or impede or inhibit operations of the facility, the person shall be guilty of a class A misdemeanor.  3. A person commits the offense of damage of a critical infrastructure if he or she purposely damages, destroys, or tampers with equipment in a critical infrastructure facility. The offense of damage of a critical infrastructure facility is a class D felony.  4. This section shall not apply to conduct protected under the Constitution of the United States, the Constitution of the state of Missouri, or a state or federal law or rule. ­­-------- (L. 2019 H.B. 355)