<Li> Blue Dress "B" is the same as "A", but medals are replaced with their corresponding ribbons and all are consolidated on the left chest . Marksmanship badges may be worn . </Li> <Li> Blue Dress "C" is the same as "B", but a khaki long sleeve button - up shirt and tie replace the outer blue coat and white gloves . Ribbons and badges are normally worn on the shirt . </Li> <Li> Blue Dress "D" is the same as "C", but with a khaki short sleeve button - up shirt and no tie . </Li> <P> Because the Blue Dress uniform is considered formal wear, Blue Dress "C" and "D" are rarely worn . The main exceptions are Marine Recruiters and Marine Corps Security Guards, who wear the "C" and "D" in warm weather, and Marine One pilots in place of a flight suit . Only the "B", "C", and "D" Blue Dress uniforms are authorized for leave and liberty wear; the "A" is not . </P>

When do marines have to wear their uniform