43 CFR § 2.46
When may you ask the bureau for a fee waiver?
June 11, 2020
(a) You should request a fee waiver when your request is first submitted to the bureau (see §2.6 of this part).
(b) You may submit a fee waiver request at a later time if the bureau has not yet completed processing your request.
[77 FR 76906, Dec. 31, 2012, as amended at 81 FR 11130, Mar. 3, 2016]