An action of revocation for ingratitude shall be brought within one year from the day the donor knew or should have known of the act of ingratitude.
If the donor dies before the expiration of that time, the action for revocation may be brought by the successors of the donor, but only within the time remaining, or if the donor died without knowing or having reason to know of the act, then within one year of the death of the donor.
If the action has already been brought by the donor, his successors may pursue it.
If the donee is deceased, the action for revocation may be brought against his successors.
La. C.C. § 1558