Skip to page content
Official US Government Icon

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure Site Icon

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

The latest general information on the Coronavirus (COVID-19) is available on For FAA-specific COVID-19 resources, please visit
United States Department of TransportationUnited States Department of Transportation

Part 450: Streamlining of Launch and Reentry Licensing Requirements

This rulemaking arose from work by the National Space Council that led to Space Policy Directive-2 (SPD-2) in May 2018, directing the U.S. Department of Transportation to streamline the regulations governing commercial space launch and reentry licensing. Part 450 consolidates multiple regulatory parts to create a single licensing regime for all types of commercial space flight launch and reentry operations, and replaces prescriptive requirements with performance-based criteria.

Four Parts Into One - Part 415, Part 417, Part 431, Part 435 - Part 450

Infographic about Part 450 (PDF)

February Workshop

  • An overview of Advisory Circular (AC) 450.115-1 (PDF) High Fidelity Flight Safety Analysis;
  • How this AC relates to the sections of Subpart C in Part 450 Streamlined Launch and Reentry License Requirements; and
  • AST responses to formal industry comments submitted.

Speakers include Erik Larson Ph.D., FAA/AST Contractor and President of Marigold RISE, and Paul Wilde, Ph.D., FAA AST Senior Technical Specialist.

Part 450 Workshop November 4–6, 2020

FAA hosted a virtual Part 450 Workshop on November 4-6, 2020. FAA's subject matter experts have reviewed each topic under Part 450 in chronological order. A crosswalk mapping tools that compare the new rule to legacy regulations was also presented on Day 3.

Video of the Part 450 Workshops

Advisory Circulars and Other Part 450 Guidance

The table below contains all of the Part 450 Advisory Circulars and other guidance documents. The FAA seeks public comment on each of these documents for a period of 30 days when issued. FAA will issue an updated version if warranted based on comments received. Each guidance document contains a feedback form with instructions on how to provide feedback at any time during the process. The Part 450 Means of Compliance Table (PDF) provides an estimated issuance date for all planned AC.

Part 450 Guidance Information
Part 450 Guidance Documents Issuance Date
Advisory Circular: 450.101-1A High Consequence Event Protection May 20, 2021
Advisory Circular: 450.103-1 Safety System Program September 7, 2021
Advisory Circular: 450.107-1 Hazard Control Strategies July 27, 2021
Advisory Circular: 450.108-1 Flight Abort Rule Development July 27, 2021
Advisory Circular: 450.109-1 Flight Hazard Analysis August 5, 2021
Advisory Circular: 450.115-1A High Fidelity Flight Safety Analysis June 24, 2021
Advisory Circular: 450.117-1 Trajectory Analysis for Normal Flight August 19, 2021
Advisory Circular: 450.141-1A Computing Systems and Software August 18, 2021
Advisory Circular: 450.173-1 Part 450 Mishap Plan – Reporting, Response, and Investigation Requirements August 12, 2021
Advisory Circular: 450.179-1 Ground Safety September 22, 2021
*Feedback for ACs may be submitted via the AC feedback form (PDF) and emailing the form to Please include the AC number/title in the subject line.

Part 450 License
Lifecycle Management Process

Lifecycle management process for License Tools to Facilitate the Licensing Process

(click to enlarge)

Pre-Application Consultation Guidance Materials for Applicants and Legacy Operators

Other Links

Page last modified: