=IF(SUM(INDEX(SecurityLevels!E$257:JF$261,0,ROW()))>0,"3",IF(AND(SUM(INDEX(SecurityLevels!E$232:JF$256,0,ROW()))>0,SUM(INDEX(SecurityLevels!E$2:JF$231,0,ROW()))>0),"2",IF(SUM(INDEX(SecurityLevels!E$2:JF$231,0,ROW()))>0,"1","0")))
Is a conditional solution.