45 C.F.R. § 2507.11
(c) Determinations on requests. In all determinations on requests, AmeriCorps will notify the requester in writing of the right to seek assistance from AmeriCorps' FOIA Public Liaison.
(3) Adverse determinations on requests. If AmeriCorps denies a request in any respect, it will notify the requester in writing of the determination and their right to seek dispute resolution services from AmeriCorps' FOIA Public Liaison or the Office of Government Information Services.
(4) Information provided in the case of a denial. Response letters that deny all or part of a request will be signed by the person making the decision and will provide: