The insured must declare to the insurer, insofar as he is aware of them, any increases in risk occurring during the course of the contract.
Any change during the term of the contract, either to what was agreed when the contract was taken out, or to the insured object, which results in a significant increase in risk, will result in the cancellation of the insurance if it is not notified to the insurer as soon as the insured becomes aware of it and at the latest within the period set by the contract, which may not be less than five working days. If the insured is acting in good faith, the provisions of the fourth paragraph of article L. 175-14 shall apply.
If this increase is not the fault of the insured, except in the case of war risks and similar risks, the insurance continues, subject to an increase in the premium accepted by the insured and corresponding to the increase that has occurred.
If the worsening of the situation is the fault of the insured, the insurer may either cancel the contract within the period specified in the contract, which may not be less than five working days from the date on which it became aware of the worsening, the premium being due pro rata for the period covered before cancellation, or demand an increase in the premium corresponding to the worsening of the situation.