(a) A parent or managing conservator of a minor who is not a ward may apply to the court under this subchapter for an order to sell an interest of the minor in property without being appointed guardian if the net value of the interest does not exceed $250,000.
(b) If a minor who is not a ward does not have a parent or managing conservator willing or able to file an application under Subsection (a), the court may appoint an attorney ad litem or guardian ad litem to act on the minor's behalf for the limited purpose of applying for an order to sell the minor's interest in property under this subchapter.