Correction of mistakes in birth and death certificates may be made by the state registrar upon written application duly verified and sworn to by the appropriate person as required by regulation and upon receipt of supporting evidence when required by regulation. Certificates corrected more than one year after the event must be marked "amended". The state registrar shall certify the corrected certificate is the true certificate. Supporting affidavits of fact must be attached to the certificate corrected more than one year after the date of the event.