14 CFR § 450.123 - Population exposure analysis.

---
identifier: "/us/cfr/t14/s450.123"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "14 CFR § 450.123 - Population exposure analysis."
title_number: 14
title_name: "Aeronautics and Space"
section_number: "450.123"
section_name: "Population exposure analysis."
chapter_name: "COMMERCIAL SPACE TRANSPORTATION, FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION"
subchapter_number: "C"
subchapter_name: "LICENSING"
part_number: "450"
part_name: "LAUNCH AND REENTRY LICENSE REQUIREMENTS"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "51 U.S.C. 50901-50923."
regulatory_source: "Docket No. FAA-2019-0229, Amdt. 450-2, 85 FR 79719, Dec. 10, 202085 FR 79739, Dec. 10, 2020, unless otherwise noted."
cfr_part: "450"
---


# 450.123 Population exposure analysis.

(a) *General.* A flight safety analysis must account for the distribution of people for the entire region where there is a significant probability of impact of hazardous debris.

(b) *Constraints.* The exposure analysis must—

(1) Characterize the distribution of people both geographically and temporally;

(2) Account for the distribution of people among structures and vehicle types;

(3) Use reliable, accurate, and timely source data; and

(4) Account for vulnerability of people to hazardous debris effects.

(c) *Application requirements.* An applicant must submit:

(1) A description of the methods used to develop the exposure input data in accordance with § 450.115(c), and

(2) Complete population exposure data, in tabular form.