45 C.F.R. § 1351.24
(e) Grantees shall, as soon as feasible and no later than 72 hours of the youth entering the program, contact the parents, legal guardians or other relatives of each youth according to the best interests of the youth. If a grantee determines that it is not in the best interest of the client to contact the parents, legal guardian or other relatives of the client, or if the grantee is unable to locate, or the youth refuses to disclose the contact information of, the parent, legal guardian or other relative of the client, they must: