---
kind: "unit"
title: "4"
title_heading: "Accounts"
key: "chI/subchB/part21"
level: "part"
label: "Part 21"
heading: "Bid Protest Regulations"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/4/chI-subchB-part21"
sections_count: 15
---

# Part 21 — Bid Protest Regulations

Title 4 C.F.R. — Accounts › Chapter I — Government Accountability Office › Subchapter B — General Procedures

## Sections

- [§21.0. Definitions.](/cfr/4/21.0.md)
- [§21.1. Filing a protest.](/cfr/4/21.1.md)
- [§21.2. Time for filing.](/cfr/4/21.2.md)
- [§21.3. Notice of protest, communications among parties, submission of agency report, and time for filing of comments on report.](/cfr/4/21.3.md)
- [§21.4. Protective orders.](/cfr/4/21.4.md)
- [§21.5. Protest issues not for consideration.](/cfr/4/21.5.md)
- [§21.6. Withholding of award and suspension of contract performance.](/cfr/4/21.6.md)
- [§21.7. Hearings.](/cfr/4/21.7.md)
- [§21.8. Remedies.](/cfr/4/21.8.md)
- [§21.9. Time for decision by GAO.](/cfr/4/21.9.md)
- [§21.10. Express options, flexible alternative procedures, accelerated schedules, summary decisions, and status and other conferences.](/cfr/4/21.10.md)
- [§21.11. Effect of judicial proceedings.](/cfr/4/21.11.md)
- [§21.12. Distribution of decisions.](/cfr/4/21.12.md)
- [§21.13. Nonstatutory protests.](/cfr/4/21.13.md)
- [§21.14. Request for reconsideration.](/cfr/4/21.14.md)