63. In case of loss, the indemnity to which the insured is entitled shall be determined by the Régie according to the difference between the insured yield and the actual yield, valued on the basis of the unit prices fixed by the Régie under section 62 and shown on the insurance certificate.
Nevertheless, the Régie may, by regulation, determine different terms and conditions of computing the indemnity, in particular when stage adjustments are applied or when the reduction in quality is covered by the insurance.