Yes, if you accept a transfer/appointment to an OCONUS location, you must immediately provide your agency with the information needed to determine your actual place of residence and to document it into your service agreement.
[FTR Amdt. 98, 66 FR 58196, Nov. 20, 2001. Redesignated by FTR Amdt. 2014-01, 79 FR 49644, Aug. 21, 2014]