CCQ-1991 - Civil Code of Québec

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542.20. No one may contest the filiation of a child on the sole ground that he was born of a parental project involving the contribution of a third person.
However, the filiation of a child whose uninterrupted possession of status is not consistent with his act of birth may be contested by providing proof that the person with whom the filiation is established was not a party to the parental project or, as the case may be, that the child was not born of that project.
2023, c. 13, s. 21.