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 organizations in the United States Department of State requires that Au Pairs are: These are the 17 agencies designated by the State Department to administer the au pair program, although two have the same address: Au pair organizations in the United States An au pair organization is an agency which complies with (which deals with foreign relations—specifically, au pairs.) This program allows foreign nationals between the ages of 18 and 26 to live with a host American family for one year, with a one-year extension permitted. To comply with the regulations, most au pair organizations hire a local coordinator. Au pair organizations must follow guidelines