41 CFR § 302-3.501 - Establishment of policies when appointing an employee to an overseas assignment.
When appointing an employee to an overseas assignment, agencies must:
(a) Establish the employee's actual place of residence at the time of appointment and state it in the service agreement;
(b) Use guidance in 8 U.S.C. 1101(a)(33) for establishing places of residence;
(c) Require the employee to sign the service agreement prior to the relocation;
(d) Pay transportation expenses for one-way return travel of immediate family members when the employee has successfully completed the service agreement period OCONUS;
(e) Determine when the public interest requires the return of the immediate family for compelling personal reasons of a humanitarian or compassionate nature; and
(f) Pay for return travel and transportation of an employee only once at the end of each agreed period of service.