Article 763

The action for revocation or reduction on the grounds set forth in article 760 shall prescribe after four years from the birth of the first child, or from his legitimation, recognition or adoption, or from the judicial declaration of filiation, or from the time information was received regarding the existence of the child believed dead.

This action cannot be renounced, and is transmitted, upon the death of the donor, to his legitimate and illegitimate children and descendants. (646a)