---
kind: "section"
citation: "43 C.F.R. § 4.771"
title: "43"
number: "4.771"
heading: "When must a petition for reopening be filed?"
url: "https://uscodex.org/cfr/43/4.771"
---

# §4.771. When must a petition for reopening be filed?

- (a) The Project Director may file a petition at any time. All other petitioners must file their petition within one year after the petitioner discovers the alleged error.
- (b) If the petitioner files their petition for reopening before the deadline for filing a petition for reconsideration under [§ 4.761(a)](/cfr/43/4.761.md?p=a), it will be treated as a petition for reconsideration.

## Notes

### Source

Source: 90 FR 2420, Jan. 10, 2025, unless otherwise noted.

### Authority

Authority: 5 U.S.C. 301, 503-504; 25 U.S.C. 9, 372-74, 410, 2201 et seq.; 43 U.S.C. 1201, 1457; Pub. L. 99-264, 100 Stat. 61, as amended.

### Source

Source: 36 FR 7186, Apr. 15, 1971, unless otherwise noted.