2557. Where insurable property, whether ship or goods, is expressly warranted “neutral”, there is an implied warranty that the property will have a neutral character at the commencement of the risk and that, so far as the insured can control the matter, its neutral character will be preserved during the risk.
Where a ship is expressly warranted “neutral” there is also an implied warranty that, so far as the insured can control the matter, she will carry the necessary papers to establish her neutrality and that she will not falsify or suppress her papers or use simulated papers. If any loss occurs through breach of this implied warranty, the insurer may bring an action for the annulment of the contract.