5 C.F.R. § 10001.3
(b) Requests for access. You may request access to a Council record about you in writing or by appearing in person. You should direct your request to the Privacy Act Officer. Written requests may be sent to: Privacy Act Officer, National Council on Disability, 1331 F Street NW., Suite 850, Washington, DC 20004. Your request should include the following information:
(4) Written requests. In addition to the information described in paragraphs (b)(1) through (3) of this section, written requests must include a statement affirming your identity, signed by you and witnessed by two persons (including witnesses' addresses) or notarized.
(e) Requests for access on behalf of someone else.
(2) If you are the parent or guardian of the individual to whom the requested record pertains, or the individual to whom the record pertains has been deemed incompetent by a court, your request for access to records about that individual must include: