Right to counsel
While a state may have many statutes, court decisions, or court rules governing appointment of counsel for a particular subject area, a "Key Development" is a statute/decision/rule that prevails over the others (example: a state high court decision finding a categorical right to counsel in guardianships cases takes precedence over a statute saying appointment in guardianship cases is discretionary).
Legislation, Custody Disputes - Children
In custody proceedings involving the visitation rights of grandparents, "If the court finds it to be in the best interests of the child, the court may appoint a guardian ad litem for the child. The guardian ad litem shall be an attorney licensed to practice law in Missouri. The guardian ad litem may, for the purpose of determining the question of grandparent visitation rights, participate in the proceedings as if such guardian ad litem were a party. The court shall enter judgment allowing a reasonable fee to the guardian ad litem." Mo. Stat. § 452.402.3.
In other types of custody proceedings, a Missouri statute authorizes the appointment of a GAL and requires such appointment where abuse is alleged, Mo. Stat. § 452.423, and a court rule requires that all GALs be licensed attorneys. Mo. Standards for Guardians Ad Litem in Juvenile and Family Court Division Matters Standard 1.0.
If "yes", the established right to counsel or discretionary appointment of counsel is limited in some way, including any of: the only authority is a lower/intermediate court decision or a city council, not a high court or state legislature; there has been a subsequent case that has cast doubt; a statute is ambiguous; or the right or discretionary appointment is not for all types of individuals or proceedings within that category.
Appointment of Counsel: categorical Qualified: yes