(a) If a child has an adjudicated parent, a proceeding to challenge the adjudication, brought by an individual who was a party to the adjudication or received notice under section 584A-201, shall be governed by the rules governing a collateral attack on a judgment.
(b) If a child has an adjudicated parent, the following rules shall apply to a proceeding to challenge the adjudication of parentage brought by an individual, other than the child, who has standing under section 584A-203 and was not a party to the adjudication and did not receive notice under section 584A-201:
(1) The individual shall commence the proceeding no later than two years after the effective date of the adjudication, unless good cause is shown;
(2) The court may permit the proceeding only if the court finds permitting the proceeding is in the best interest of the child pursuant to section 571-46(b); and
(3) If the court permits the proceeding, the court shall adjudicate parentage under section 584A-607.