Massachusetts General Laws Part I. Administration of the Government (Ch. 1-182) Ch. 128, § 48

Each agricultural or horticultural society or farmers' club may establish such regulations, not inconsistent with law, as it considers necessary and expedient for the preservation of peace and good order or for the protection of its interests at its regular or annual meetings, shows, fairs or exhibitions, and shall cause at least five copies of such regulations to be posted in public places on its grounds not less than forty-eight hours before the time of holding each meeting, show, fair or exhibition.