14 CFR § 450.151 - Work shift and rest requirements.

---
identifier: "/us/cfr/t14/s450.151"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "14 CFR § 450.151 - Work shift and rest requirements."
title_number: 14
title_name: "Aeronautics and Space"
section_number: "450.151"
section_name: "Work shift and rest requirements."
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"
---


# 450.151 Work shift and rest requirements.

(a) *General.* For any launch or reentry, an operator must document and implement rest requirements that ensure safety-critical personnel are physically and mentally capable of performing all assigned tasks.

(b) *Work shifts and deviation approval process.* An operator's rest requirements must address the following:

(1) Duration of each work shift and the process for extending this shift, including the maximum allowable length of any extension;

(2) Number of consecutive work shift days allowed before rest is required;

(3) Minimum rest period required—

(i) Between each work shift, including the period of rest required immediately before the flight countdown work shift; and

(ii) After the maximum number of work shift days allowed; and

(4) Approval process for any deviation from the rest requirements.

(c) *Application requirement.* An applicant must submit rest rules that demonstrate compliance with the requirements of this section.