Page 2. (a) directly attributable to military service during the war, or (b) due to a wound, injury or disease which:- (i) arose during war service or existed b### such service, and (ii) was aggravated by war service to a material extent and remains aggravated thereby. (2) A disability shall not be certified to be attributable to military service during the war unless there is evidence of the wound, injury, or disease in contemporary official records or by other reliable corroborative evidence; and in either case the evidence is good and sufficient that the disability was in fact attributable to war service.