5 C.F.R. § 9301.11
(b) Waiver. SIGAR may waive all or part of any fee provided for in §§ 9301.8 through 9301.9 when the FOIA Officer deems that as a matter of administrative discretion or disclosure of the information is in the general public's interest because it is likely to contribute significantly to public understanding of the operations or activities of the Government and is not primarily in the commercial interest of the requester. Requesters may request a waiver in their initial FOIA request letter. Requests for a fee waiver should explain how the information requested contributes to the public's understanding of the operations or activities of the government. In determining whether a fee should be waived, the FOIA Officer may consider whether:
[77 FR 34180, June 11, 2012, as amended at 77 FR 38172, June 27, 2012]