Family Code, Art. 171

The heirs of the husband may impugn the filiation of the child within the period prescribed in the preceding article only in the following cases: (1) If the husband should died before the expiration of the period fixed for bringing his action; (2) If he should die after the filing of the complaint without having desisted therefrom; or (3) If the child was born after the death of the husband. (262a)