(a) The Division of Human Services, Bureau of Indian Affairs (BIA), is authorized to receive all information and to maintain a central file on all State Indian adoptions. This file is confidential and only designated persons may have access to it.

(b) Upon the request of an adopted Indian who has reached age 18, the adoptive or foster parents of an Indian child, or an Indian Tribe, BIA will disclose such information as may be necessary for purposes of Tribal enrollment or determining any rights or benefits associated with Tribal membership. Where the documents relating to such child contain an affidavit from the biological parent or parents requesting anonymity, BIA must certify to the Indian child's Tribe, where the information warrants, that the child's parentage and other circumstances entitle the child to enrollment under the criteria established by such Tribe.

(c) BIA will ensure that the confidentiality of this information is maintained and that the information is not subject to the Freedom of Information Act, 5 U.S.C. 552,as.