The Department of Human Services, in cooperation with the Maryland Department of Health, shall develop intervention systems in at least four counties designated by the Secretary of Human Services that: include drug treatment for a mother of a child who is born drug exposed and supportive services for the family of the child; and serve 300 families. An intervention shall be initiated when: a child is born drug exposed; and medical personnel have determined that the child is at a high risk of abuse or neglect. Subject to the provisions of subsections (a) and (b) of this section, the local department of social services and the Maryland Department of Health shall assist the mother of a child who is born drug exposed in: obtaining drug treatment; and providing supportive services to maintain family unity. A CINA petition shall be filed on behalf of a child who is born drug exposed, if: the mother refuses the recommended level of drug treatment, or does not successfully complete the recommended level of drug treatment; the mother is unable to provide adequate care for the child; and the father is unable to provide adequate care for the child.