(a) Notwithstanding any other provision of law, substantiated reports shall not be expunged from the Child Protection Register. (b) The staff which maintains the Child Protection Register shall expunge from each inconclusive report all information that identifies any person in the inconclusive report upon the first occurrence of either: (1) The 18th birthday of the child who is the subject of the report, if there is no reasonable suspicion or evidence that another child living in the same household or under the care of the same parent, guardian, or custodian has been abused or neglected; or (2) The end of the 5th year after the termination of the social rehabilitation services directed toward the abuse and neglect. (c) The staff which maintains the Child Protection Register shall expunge: (1) Any unfounded report immediately upon such classification by the Agency; and (2) Any material successfully challenged as incorrect pursuant to the rules adopted under § 4-1302.06.