The Gun-Free School Zones Act (GFSZA) prohibits any person from knowingly possessing a gun in a “school zone.” The law applies to public, private, and parochial elementary schools and high schools, and to non-private property within 1000 feet of them. The law was introduced by Congress and encouraged each state receiving federal funds for education to follow suit and introduce their own laws, now known as zero tolerance laws. Section 1702(b)(5) of Pub. L. 101-647 states: "Federal, State, and local authorities are encouraged to cause signs to be posted around school zones giving warning of prohibition of the possession of firearms in a school zone." It is always a good practice to display No Guns Signs to inform visitors and employees of the prohibition. We still advise you to check the relevant state and local laws and school district policies to understand the specific requirements regarding No Guns Signs in schools. Laws and regulations can change over time, so it's essential to consult up-to-date sources for the most accurate information.