If the recall service lasts less than one year, the contributions of the annuitant to the Fund during recall service shall be refunded in accordance with section
of this title. If the recall service lasts more than one year, the annuitant may, in lieu of such refund, elect a supplemental annuity computed under section
of this title on the basis of service credit and average salary earned during the recall period irrespective of the number of years of service credit previously earned. If the recall service continues for at least 5 years, the annuitant may elect to have his or her annuity determined anew under section
of this title in lieu of any other benefits under this section. Any annuitant who is recalled under section
of this title may upon written application count as recall service any prior service that is creditable under section
of this title that was performed after the separation upon which his or her annuity is based.