14 CFR § 437.27 - Pre-flight and post-flight operations.

---
identifier: "/us/cfr/t14/s437.27"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "14 CFR § 437.27 - Pre-flight and post-flight operations."
title_number: 14
title_name: "Aeronautics and Space"
section_number: "437.27"
section_name: "Pre-flight and post-flight operations."
chapter_name: "COMMERCIAL SPACE TRANSPORTATION, FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION"
subchapter_number: "C"
subchapter_name: "LICENSING"
part_number: "437"
part_name: "EXPERIMENTAL PERMITS"
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-2006-24197, 72 FR 17019, Apr. 6, 2007, unless otherwise noted."
cfr_part: "437"
---


# 437.27 Pre-flight and post-flight operations.

An applicant must demonstrate how it will meet the requirements of § 437.53(a) and (b) to establish a safety clear zone and verify that the public is outside that zone before and during any hazardous operation.