Missouri Revised Statutes Title XI. Education and Libraries § 182.230. Library free to public subject to regulations

Every library and reading room established under sections 182.140 to 182.301 shall be forever free to the use of the inhabitants of the city where located, always subject to such reasonable rules and regulations as the library board may adopt in order to render the use of the library and reading room of the greatest benefit to the greatest number. The board may exclude from the use of the library and reading room any and all persons who willfully violate such rules. The board may extend the privileges and use of the library and reading room to persons residing outside of the city in this state, upon such terms and conditions as the board, from time to time, by its regulations, may prescribe.