International Committee of the Red Cross relief workers in armed conflicts and is to be placed on humanitarian and medical vehicles and buildings. The original emblem that has a red cross on a white background is the exact reverse of the flag of neutral Switzerland. It was later supplemented by two others which are the Red Crescent, and the Red Crystal. The Red Crescent was adopted by the Ottoman Empire during the Russo-Turkish war and the Red Crystal by the governments in 2005, as an additional emblem devoid of any national, political or religious connotation. The official mission statement says that: "The International Committee of the
Flag of Switzerland squares until 1889, when its dimensions were officially set. The civil and state ensign of Switzerland, used by Swiss ships, boats and non-governmental bodies, is rectangular in shape and has the more common proportions of 3:2. The Swiss flag is one of only two square sovereign-state flags, the other being the flag of Vatican City. The emblem of the Red Cross is the Swiss flag with switched colours. According to the 2017 flag law (SR 232.21), "The Swiss flag shows a Swiss cross on a square background". Special provisions are made for the naval ensign and for civil aircraft identification.