 That of the Commissioner includes a two-inch oak leaf lace strip on the trousers and a set of aiguillettes.A matching black waistcoat is worn and badges of rank are displayed on the epaulettes.Formal uniform comprises an open-necked tunic (with or without an attached belt, depending on the force and rank of the officer) and trousers or skirt, worn with a white or light blue shirt and black tie (usually clip-on, so it cannot be used to strangle the wearer).