If you purchase the optional additional Supplemental Liability Insurance (SLI), your policy will provide cover against costs you become legally liable to pay in respect of bodily injury and damage to property as a result of an accident whilst using the rental vehicle during the period of insurance for a trip in or through the USA, Canada, the Caribbean, South or Central America. The cover provided by this policy shall apply only in excess of amounts recoverable under any other applicable insurance, and the maximum that will be paid in respect of all claims arising from any one accident shall be the difference between the amount recoverable under any other insurance and US $1,000,000 (or equivalent in local currency).