As to wearing miniature medals with civilian clothes.
For a black or white tie occasion, the rule is quite simple: if the lapel is wide enough, wear the miniatures on the left lapel or, in the case of a shawl lapel on a tuxedo, the miniature medals are worn over the left breast pocket. The center of the holding bar of the bottom row of medals should be parallel to the deck immediately above the pocket. D not wear a pocket handkerchief.