National Marker Company signage with legend “NOTICE - Marijuana smoking prohibited” is often used to inform people about places that don't allow or prohibit smoking marijuana. Often used at commercial and residential locations, and in public places, warehouses, workplaces and jobsites. This sign is often used as a part of safety measures to inform people about health related safety hazards caused by smoking marijuana. This ANSI signage is easy to spot and read, ensuring working personnel and visitors are immediately cautioned about smoking-related prohibitions/restrictions.