This is the formal uniform worn on ceremonial occasions. For all commissioned officers it consists of a double-breasted, navy blue reefer jacket with four rows of two buttons, matching trousers, white shirt, black tie, peaked cap, black socks, and black leather shoes. It is divided into 1A (with medals and bearing arms), 1B (same as 1A, but without arms), and 1C (with medal ribbons). Female personnel may wear skirts except when carrying a sword or rifle. It was originally introduced in 1889 and was initially known as the 'undress coat'.