5 CFR § 591.231 - Which areas are post differential areas?

---
identifier: "/us/cfr/t5/s591.231"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "5 CFR § 591.231 - Which areas are post differential areas?"
title_number: 5
title_name: "Administrative Personnel"
section_number: "591.231"
section_name: "Which areas are post differential areas?"
chapter_name: "OFFICE OF PERSONNEL MANAGEMENT"
subchapter_number: "B"
subchapter_name: "CIVIL SERVICE REGULATIONS"
part_number: "591"
part_name: "ALLOWANCES AND DIFFERENTIALS"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
cfr_part: "591"
---


# 591.231 Which areas are post differential areas?

OPM has established the following post differential areas:

(a) American Samoa as defined in § 591.205,

(b) Territory of Guam,

(c) Commonwealth of the Northern Mariana Islands,

(d) Johnston Atoll (including Sand Island),

(e) Midway Atoll, and

(f) Wake Atoll.