(a) Except as provided by Subsection (b), the court may appoint an attorney in a suit filed under this subchapter for the respondent.
(b) The court shall appoint an attorney in a suit filed under this subchapter for a respondent reported to be a prisoner of war or missing on public service.
(c) The court shall allow a reasonable fee for an appointed attorney's services as a part of the costs of the suit.