How a Rocket Launch Gets FAA Approval: Part 450 Licensing Explained

Every commercial rocket that lifts off from US soil, and every capsule that comes back down, needs permission from the Federal Aviation Administration. Since March 2026 that permission comes through a single rulebook, known as Part 450. The change is easy to miss because launches look the same from the beach, but it shapes how often companies can fly, how much paperwork a new rocket needs, and what happens after something goes wrong.

This guide explains what an FAA launch licence covers, the safety numbers operators must meet, how long approval takes, who pays if debris causes damage, and what follows a mishap.

Key facts at a glance

• One rule since March 2026. The FAA's older launch and reentry rules (Parts 415, 417, 431 and 435) were removed from the federal regulations on March 10, 2026. Every licence is now issued under Part 450.
• Licences last up to five years. A Part 450 vehicle operator licence can run for up to five years from issue and can be renewed.
• The review clock is 180 days. Once the FAA accepts a complete application, it has 180 days to decide on a licence and 120 days for an experimental permit.
• Public risk has a hard ceiling. The expected number of casualties among the public from a single launch must not exceed 1 in 10,000, and the chance of harming any one person must not exceed 1 in a million.
• Insurance is capped. Required third-party liability cover tops out at $500 million per launch or reentry, and cover for government property at $100 million.
• Fourteen licences so far. The FAA said in March 2026 that it had issued 14 Part 450 licences since the rule took effect in March 2021.

Why the FAA rewrote the rules

Commercial space licensing used to be split across four separate regulations, written for different kinds of vehicles. Part 415 and Part 417 covered expendable launches, Part 431 covered reusable vehicles, and Part 435 covered reentry. A company flying a reusable booster that also landed back on Earth could find itself juggling several sets of requirements that did not always fit its hardware.

The FAA issued Part 450 in 2020 and it took effect in March 2021. The agency describes it as performance-based: instead of prescribing exactly how an operator must prove safety, it sets the safety outcome and lets the operator propose a means of compliance. An applicant can use a method the FAA has already accepted, or propose its own as long as it meets the same safety standard.

For five years the old and new rules ran side by side so operators could move across. That transition ended on March 9, 2026, when licences issued under the old rules expired. The FAA named the operators that switched in time: Blue Origin's New Shepard, Firefly Aerospace's Alpha, SpaceX's Falcon 9, Falcon Heavy and Dragon, Rocket Lab's Electron, and United Launch Alliance's Atlas and Vulcan.

The practical gain is fewer separate approvals. Under Part 450, one licence can cover a portfolio of missions, different vehicle configurations and mission profiles, and even several launch and reentry sites. For companies trying to fly every few days, that matters more than any single rule.

What a licence actually covers

The FAA's Office of Commercial Space Transportation issues several kinds of authorisation, and it helps to know which is which.

Hobby rockets sit outside most of this. The FAA classes a rocket as an amateur rocket only if it stays suborbital, carries no people, flies below 150 kilometres and has a total impulse under 200,000 pound-seconds. Anything bigger needs a permit or licence.

The safety numbers behind every launch

The core of Part 450 is a set of risk limits in section 450.101. Operators must show, through analysis the FAA accepts, that each flight stays inside them. The main limits for a launch are:

• Collective public risk: no more than 1 × 10⁻⁴ expected casualties among the public for the flight, excluding people in aircraft and personnel at neighbouring operations.
• Neighbouring operations staff: no more than 2 × 10⁻⁴ expected casualties collectively.
• Individual risk: no more than a 1 in 1,000,000 chance that any single member of the public becomes a casualty, and 1 in 100,000 for neighbouring operations staff.
• Aircraft: hazard areas must keep the chance of debris hitting an aircraft at or below 1 in 1,000,000.
• Critical assets: for property that federal agencies flag as critical, the chance of losing its function must stay at or below 1 in 1,000, or 1 in 10,000 for a critical payload.

The same limits apply to reentry, measured from the final health check before the deorbit burn through landing or impact. For an orbital launch, the limits run from liftoff to orbital insertion; for a suborbital flight, from liftoff to landing.

Part 450 also asks operators to guard against a "high consequence event" in uncontrolled areas. They can do that with a flight abort system, by showing that no reasonably foreseeable failure would cause more than 1 × 10⁻³ conditional expected casualties, or by demonstrating enough reliability for that phase of flight. Operators must also warn the public about any land, sea or air region that contains, with 97% probability, all the debris from normal flight events that could hurt someone. That rule is the reason boaters and pilots see hazard notices before a launch.

How long approval takes

Licensing starts well before any form is filed. Under section 413.5, every applicant must hold pre-application consultation with the FAA. The agency's own guidance describes an early stage where it reviews the applicant's concept of operations, schedule and funding to see whether it is ready for formal talks, then deeper discussions covering safety, environmental, policy and payload questions.

Once the FAA accepts an application as complete, the statutory clock starts: 180 days for a licence and 120 days for a permit. The agency also aims for 180 days on safety element approvals as an internal target. The clock can be paused, which the FAA calls tolling, when it needs information that the applicant has not supplied.

A licence decision rests on several reviews, all of which have to come out favourable:

1. Policy review, where the FAA consults agencies such as the Defense and State Departments on national security and foreign policy issues.
2. Payload review, covering what is being flown unless another agency already regulates it.
3. Safety review, testing the risk analysis against the limits above.
4. Environmental review, required under the National Environmental Policy Act, often the longest part for a new site or a new vehicle.
5. Financial responsibility, setting the insurance the operator must carry.

The FAA's guidance warns that changing an operation after environmental analysis begins may force the environmental document to be revised, costing time and money. For that reason, companies tend to settle their vehicle design and flight profile before starting the environmental work.

Who pays if something goes wrong

Every licence and permit holder must show it can cover damage from a mishap. The FAA calculates a maximum probable loss for each licence, a statistical estimate of the largest loss reasonably expected rather than the worst possible case. For third parties, that means losses with at least a one-in-ten-million chance of happening; for government property and staff, at least one in a hundred thousand.

The required cover is capped. Third-party liability insurance never has to exceed $500 million per launch or reentry, and cover for US government property never has to exceed $100 million, or less if that much insurance is not available on the world market at reasonable cost. The FAA must issue its determination within 90 days of receiving everything it needs. Operators can also set funds aside or use escrow, but the FAA says buying insurance is the most common and preferred route.

The FAA is blunt about the limits of this: costs can exceed the estimate. Licensed operations can benefit from government cover for losses above the insured amount, while experimental permits do not carry the same protection.

What happens after a mishap

Part 450 requires every operator to have a mishap plan covering reporting, response and investigation. A mishap includes events such as a fatality or serious injury, a failure of a safety system, significant property damage, or debris landing outside the expected hazard areas.

After a mishap, the operator reports it to the FAA and investigates the root cause. The FAA can run the investigation itself or let the operator lead it under FAA oversight, which is the common arrangement when nobody among the public was hurt. A vehicle generally returns to flight once the FAA accepts the final report and the corrective actions are in place. The FAA can also make a public safety determination that allows flights to resume while the investigation stays open, if the problem posed no public safety risk.

What to watch next

The move to a single rule has not ended debate about licensing speed. The FAA framed the March 2026 transition as streamlining that cuts cost and paperwork for both industry and the agency, and its count of 14 Part 450 licences gives a baseline for judging whether approvals speed up as more operators file under one framework.

For anyone following a launch, a few signals are worth tracking: whether a new vehicle is flying under an experimental permit or a full licence, whether a licence modification has been issued for a new site or mission profile, and how long a mishap investigation stays open before return to flight. All three show where a programme really stands, beyond what the press release says.