(a) A minor child is a permissible party, but is not a necessary party to a proceeding under this subchapter.
(b) The court shall appoint a guardian ad litem to represent a minor or incapacitated child if the child is a party or the court finds that the interests of the child are not adequately represented.
(c) Where all necessary parties to a parentage action agree to genetic testing despite the availability of affirmative defenses, they shall be presumed to be adequately representing the interests of the child subject to the court's consideration of the factors recited in § 8-608(b) of this title.