(a)Appeals of adverse determinations.(1) The requesting party may appeal: (i) A decision to withhold any requested record in whole or in part;(ii) A determination that a requested record does not exist or cannot be located;(iii) A denial of a request for expedited treatment; or(iv) Any disputed fee matter or the denial of a request for a fee waiver.(2) The appeal must be addressed to the President and Chief Executive Officer, in care of the Chief Legal Officer and General Counsel; National Railroad Passenger Corporation; 60 Massachusetts Avenue NE., Washington, DC 20002.(3) The appeal must be in writing and specify the relevant facts and the basis for the appeal. The appeal letter and envelope should be marked prominently that it is a Freedom of Information Act or "FOIA" appeal to ensure that it is properly routed.(4) The appeal must be received by the President's Office within ninety days of the date of denial.(5) An appeal will not be acted upon if the request becomes a matter of FOIA litigation.(b)Responses to appeals. The decision on any appeal shall be made in writing. (1) A decision upholding an adverse determination in whole or in part shall contain a statement of the reason(s) for such action, including any FOIA exemption(s) applied. The requesting party shall also be advised of the provision for judicial review of the decision contained in 5 U.S.C. 552(a)(4)(B) .(2)Engaging in dispute resolution services provided by OGIS. Mediation is a voluntary process. If Amtrak agrees to participate in the mediation services provided by OGIS, it will actively engage as a partner to the process in an attempt to resolve the dispute.(3) If the adverse determination is reversed or modified on appeal in whole or in part, the requesting party shall be notified, and the request shall be reprocessed in accordance with the decision.(c)When appeal is required. The requesting party generally must timely appeal any adverse determination prior to seeking judicial review.