; (bb) refers the complaint to any other entity for investigation; or (cc) determines that the complaint is not a proper subject for an investigation. (II) Disclosure Disclosure of any such information may only occur as necessary to carry out the mission of the Office and as permitted by law. (E) Reporting mechanisms (i) In general The Ombudsperson shall establish and maintain— (I) a public toll-free telephone number to receive complaints and reports of matters for investigation; and (II) a public email address to receive complaints, such reports, and requests for review of placement and sponsorship decisions. (ii) Availability (I) In general The Ombudsperson shall ensure that such telephone number and email address— (aa) are made available, and a telephone is accessible, to all children in immigration custody