“ The Secretary of the Navy is authorized and directed to award the Purple Heart in the name of the President of the United States to persons who, while heretofore or hereafter serving in any capacity with the Navy, Marine Corps or Coast Guard of the United States, are wounded in action against an enemy of the United States, or as a result of an act of such enemy, provided such would necessitates treatment by a medical officer. ”

“ Except as authorized in paragraph three hereof, no more than one Purple Heart shall be awarded to any one person, but for each subsequent justification for such an award a Gold Star, or other suitable device shall be awarded, to be worn with the Purple Heart as prescribed by appropriate regulations. ”