worn on each sleeve of the jacket. A white cummerbund with a white bow tie is authorized (for white tie events) for SNCO's. A summer white mess dress (see link for pictures of the obsolete uniforms), similar in design to U.S. Navy and U.S. Coast Guard uniforms, but with shoulder epaulettes instead of rank boards, was worn until the mid-1990s when it was phased out. U.S. Navy, Coast Guard, Merchant Marine and others Officers and chief petty officers of the U.S. Navy, U.S. Coast Guard, United States Public Health Service Commissioned Corps, NOAA Corps, and Merchant Marine use the same mess uniform, referred to as "dinner dress". There are three styles of this uniform—dinner dress, dinner dress jacket, and tropical dinner dress. Dinner dress uniforms, blue and white, are modifications of service dress blue or service dress white uniforms, with the service ribbons and breast insignia replaced by miniature medals and miniature breast insignia. Additionally, officers and chief petty officers wear an evening shirt and black bow tie with dinner dress blue. Dinner dress blue jacket and dinner dress white jacket consist of a black waist-length jacket with gold buttons (officer) or silver buttons (petty officer first class and below). The jacket is double-breasted, but does not overlap, and is held with a clasp. (This, in contrast to double-breasted civilian evening jackets, which are worn fully open, or double-breasted smoking jackets which are worn fully overlapped and buttoned). Bullion or imitation bullion rank stripes are worn on the sleeves of the officers' blue jacket, and a rating badge and service stripes are worn by enlisted personnel. On the officers' dinner dress white jacket, hard shoulder boards are worn. A gold cummerbund is worn by officers and chief petty officers, and a black one by petty officers first class and below. Shirt studs and cuff links are gold for officers and chiefs and silver for petty officers first class and below. A hat or cap is not required with dinner dress jacket uniforms, but may be worn. For both genders, it must be worn with an outer garment, which is traditionally the boat cloak for males and cape for females. Females do not need to remove headgear indoors when wearing the tiara. The boat cloak, tiara, and cape, all being optional items, are very rarely seen. Tropical dinner dress blue incorporates dinner dress blue trousers, summer white (short sleeve) shirt, an