No later than five days after a petition is filed, the petitioner shall mail or otherwise deliver notice of the adoption proceeding to any agency that has undertaken but not yet completed a preplacement assessment and any agency ordered to make a report to the court pursuant to Part 5 of this Article. The petitioner shall provide proof of service of the notice to the court. (1995, c. 457, s. 2; 1997-215, s. 3; 2019-243, s. 18.)