The application for revocation on grounds of ingratitude must be made within one year from the day of the offence imputed by the donor to the donee, or from the day on which the offence could have been known by the donor.
This revocation may not be requested by the donor against the heirs of the donee, nor by the heirs of the donor against the donee, unless, in the latter case, the action was brought by the donor, or he died within the year of the offence.