Because it is necessary to receive urgent medical treatment. Otherwise it may be dangerous to life. Insured can get treated. In a hospital near where the accident insured by relatives or people involved will need to hurry to notify the selected hospital to know to be responsible for next step medical expenses. For medical expenses incurred before you notify the selected hospital know. Social Security Office will be responsible for expenses incurred within 3 days (72 hours) by category, and the rate at which the scheduled announcement.