If you manufacture or export Auxiliary Military Equipment controlled under Category XIII of the U.S. Munitions List, you may rightly consider the category number unlucky. The current scope of Category XIII controls is broad and can be difficult to interpret. The category includes SCUBA gear and might be read to cover materials for an army shed or the green paint slapped on to that shed. On January 15, 2014, amendments to Category XIII go into effect. Those amendments, briefly described below, both narrow and clarify the Category XIII controls. Congratulations: it looks as if your luck may be changing.