The Girl Scouts of the USA has six levels: Daisy, Brownie, Junior, Cadette, Senior and Ambassador. Girl Scouts move or "bridge" to the next level, usually at the end of the school year, when they reach the age of advancing. The Ambassador level is the most recent, having been added in 2011. They are considered in the appropriate level based on their grade on October 1, the start of each new Girl Scout year. There are exceptions for "special needs," but Girl Scouts who are "young in grade" have not been specifically considered. Each year of membership in Girl Scouting is represented on the uniform by a small, golden, six-pointed membership star (one per year) with colored background discs which represent a level. Girl Scouts wear uniforms consisting of a white shirt and khaki bottom under the appropriate uniform item for their level: a blue tunic or vest for Daisies (kindergarten and grade 1), a brown sash or vest for Brownies (grades 2-3), a green vest or sash for Juniors (grades 4-5) and a tan sash or vest for the older girl levels of Cadettes (grades 6-8), Seniors (grades 9-10) and Ambassadors (grades 11-12). All uniform tunics, vests, or sashes must include the American flag patch, council ID patches troop numbers, and a yellow, brown, green, or navy tab with the WAGGGS pin and the membership pin.