# Enabling Supersonic Overland Flight

**Action Urgency Score:** 45/100

| Field | Value |
|---|---|
| Agency | Transportation Department; Federal Aviation Administration |
| Type | Proposed rule |
| Action | Notice of proposed rulemaking (NPRM). |
| Published | 2026-07-02 |
| Comments close | 2026-08-17 |
| Significant | Yes (EO 12866) |
| CFR parts | 14 CFR 1, 14 CFR 91 |
| Summary | This proposal would advance the United States' leadership in next-generation aviation by replacing the longstanding prohibition on civil supersonic flight over land with a modern, performance-based regulatory framework. Consistent with national policy set forth by the Executive Order of June 6, 2025, Leading the World in Supersonic Flight, this action would enable the safe, efficient, and commercially viable operation of civil supersonic aircraft in the United States. Current regulations prohibit flight operations of civil aircraft at a true flight Mach number greater than 1 in the U.S., excep |
| Document number | 2026-13440 |

## Why this score
- Significant rule under EO 12866.

Source: Federal Register API (Office of the Federal Register) (https://www.federalregister.gov/documents/2026/07/02/2026-13440/enabling-supersonic-overland-flight). Last refreshed: 2026-11-04T21:40:49.974Z.
Data from the Federal Register API; the published Federal Register document is authoritative. Informational only, not legal advice.