A child of whom the Department of Health and Human Resources assumes care, control and custody under this article is a relinquished child and to be treated in all respects as a child taken into custody pursuant to section three hundred three, article four of this chapter. Upon taking custody of a child under this article, the department, with the cooperation of the county prosecuting attorney, shall cause a petition to be presented pursuant to section six hundred two, article four of this chapter. The department and county prosecuting attorney may not identify in the petition the parent(s) who utilized this article to relinquish his or her child. Thereafter, the department shall proceed in compliance with part six, of this article.