A legacy for charitable use may not be void because of an uncertainty with respect to the donees: If the will making the legacy also contains directions for the formation of a corporation to take the legacy; and If the legacy is immediate and not subject to a life estate, a corporation is formed in accordance with the directions, capable and willing to receive and administer the legacy, within 12 months from the probate of the will; or If the legacy is subject to a life estate, a corporation shall be formed at a time between probate of the will and the end of 12 months following the expiration of a life estate or life estates.