((a)) ** .—** If a person to whom applies is determined to be mentally incompetent by medical officers of the armed force concerned or of the Department of Veterans Affairs, or by a court of competent jurisdiction, an election described in subsection (a)(2) or (b) of may be made on behalf of that person by the Secretary concerned.

((b))

((1)) ** .—** If a person for whom the Secretary has made an election under subsection (a) is later determined to be mentally competent by an authority named in that subsection, that person may, within 180 days after that determination, revoke that election.

((2)) ** .—** Any deduction made from retired pay or combat-related special compensation by reason of such an election may not be refunded.