591.231 Which areas are post differential areas§ 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.