Emblems of the International Red Cross and Red Crescent Movement with Sun and the Red Crystal, are defined in the Geneva Conventions and their Additional Protocols as symbols for protective use. When used as an organizational logo, these symbols only indicate that persons, vehicles, buildings, etc. which bear the symbols belong to a specific organization which is part of the International Red Cross and Red Crescent Movement (like the ICRC, the International Federation or the national Red Cross and Red Crescent societies). In this case, they should be used with an additional specification (for example "American Red Cross") and not be displayed as prominently as when used as protection symbols.
Thai Red Cross Society Plien acted as the society secretary. The society's name was later changed to the Siam Red Cross Society and, following the renaming of the country, the Thai Red Cross Society. The society was officially recognized by the International Committee of the Red Cross on 27 May 1920, and membership in the International Federation of Red Cross and Red Crescent Societies (then the League of Red Cross Societies) was granted on 8 April 1921. Following the statutes of the International Red Cross and Red Crescent Movement, the Thai Red Cross Society provides humanitarian aid and relief services in times of war