Section 62. Prescription of Rights and Actions.— Rights of compensation under this Act shall prescribe after ten years from the date of the nuclear incident. Furthermore, actions for compensation under this Act shall be barred unless brought within three years from the date on which the person suffering nuclear damage had knowledge or should have had knowledge of the damage and of the installation operator liable for the damage: Provided, However, That any person who claims to have suffered nuclear damage and who has brought an action for compensation within the period applicable pursuant to this Section may amend his claim to take into account any aggravation of the damage, even after the expiry of that period: Provided, Further, that final judgment has not been entered in the case.