Comprehensive medical records will generally exist in relation to members of the Permanent Forces, because of their utilisation of ADF Medical Services. Accordingly, the date of occurrence should be set as the date when the member first sought treatment for the condition which later became the subject of the claim. This date can be established from close examination of the member's medical records, supplemented where necessary by a further report from a medical practitioner. Note again this does not mean the date of the original injury if that was the cause of the onset of a disease at a later stage. The date of effect will be the date of first treatment for that disease.