extended active duty
(4) Treatment of military personnel stationed outside the United States For purposes of paragraphs (1)(A)(ii)(I) and (3)(C), the principal place of abode of a member of the Armed Forces of the United States shall be treated as in the United States during any period during which such member is stationed outside the United States while serving on extended active duty with the Armed Forces of the United States. For purposes of the preceding sentence, the term “extended active duty” means any period of active duty pursuant to a call or order to such duty for a period in excess of 90 days or for an indefinite period.