An omission or misrepresentation on the part of an insured who has not acted in bad faith shall not render the insurance null and void.
If it is established before any claim, the insurer has the right either to maintain the contract, subject to an increase in the premium accepted by the insured, or to cancel the contract ten days after notification to the insured by registered letter, refunding the portion of the premium paid for the time during which the insurance is no longer in force.
In the event that the declaration is made only after a claim has been made, the indemnity shall be reduced in proportion to the rate of premiums paid in relation to the rate of premiums that would have been due had the risks been fully and accurately declared.