Chemical Corps affiliation with the corps. The Chemical Corps branch insignia consists of a cobalt blue, enamel benzene ring superimposed over two crossed gold retorts. The branch insignia, which was adopted in 1918 by the fledgling Chemical Service, measures .5 inches in height by 1.81 inches in width. Crossed shells with a dragon head was also commonly used in France for the Chemical service. The Chemical Warfare Service approved the insignia in 1921 and in 1924 the ring adopted the cobalt blue enamel. When the Chemical Warfare Service changed designations to the Chemical Corps in 1946 the symbol was retained. The regimental
Au pair sites. Commercial au pair agencies do not charge a placement fee to incoming au pairs. The Au-Pair Society e.V. is a member of the International Au Pair Association (IAPA) and is also in a committee ECAPS (European Committee for Au-Pair Standards) where members of National Organisation from several European countries have defined new Standards for Au-Pair programme in Europe. Non-EU citizens no older than 24 can become au pairs through a German agency. Americans and Canadians do not need to apply for a residence and work permit before leaving their home countries; however, it is a general requirement that au