(1) A person becomes a guardian for a minor only on appointment by the court.
(2) The court may appoint a guardian for a minor who does not have a guardian if the court finds the appointment is in the minor's best interest and:
(a) Each parent of the minor, after being fully informed of the nature and consequences of guardianship, consents;
(b) All parental rights have been terminated; or
(c) There is clear and convincing evidence that no parent of the minor is willing or able to exercise parenting functions as defined in RCW
26.09.004.