(1) extradition proceedings;

(2) habeas corpus and other proceedings wherein the person is confined in a penal or mental institution in this state and seeks release therefrom; or

(3) proceedings arising out of a petition brought in a juvenile court when the court deems the interests of justice require representation of either the child or his or her parents or guardian or both, including any subsequent proceedings arising from an order therein. (Added 1971, No. 161 (Adj. Sess.), § 6, eff. date, see note.)