In consideration of additional premium the policy may be extended to cover risks of (a) physical loss of oil/chemicals by leakage from its container by accidental means and all accidental contaminations by contact with foreign matter, subject to exclusions specified or (b) physical loss of oil/chemical by leakage from its container by accidental means subject to exclusions specified. Extension applies to oils and chemicals and not to any other commodity. Cover commences only on or after the receipt of subject matter in lands tanks. In case of loss the basis of adjustment shall be the market value at the time and place of loss. In case of earthquake shock 72 hours clause for calculation of loss by single earthquake shall apply. Each claim for loss or damage shall be adjusted separately subject to an excess of 1% of ach tank with a minimum of Rs. 60,000 for each loss.