14 U.S.C. § 494 : US Code - Section 494: Insignia for additional awards

Search 14 U.S.C. § 494 : US Code - Section 494: Insignia for additional awards

No more than one medal of honor, distinguished service medal,
distinguished flying cross, or one Coast Guard medal shall be
issued to any one person; but for each succeeding deed or service
sufficient to justify the awarding of a medal of honor,
distinguished service medal, distinguished flying cross, or Coast
Guard medal, the President may award a suitable emblem or insignia
to be worn with the decoration and a corresponding rosette or other
device.