At the hearing, if the court sustains the recommendation of the department or delegated county adoption agency that the child be removed from the home of the petitioners because the department or agency recommends denial or if the petitioners move to withdraw the petition or if the court dismisses the petition and does not return the child to the birth parents, the court shall commit the child to the care of the department or delegated county adoption agency, whichever made the recommendation, for the department or agency to arrange adoptive placement or to make a suitable plan. In those counties not served by a delegated county adoption agency, the county welfare department shall act as the agent of the department and shall provide care for the child in accordance with rules and regulations established by the department.