41 C.F.R. § 303-70.200
Circumstances for authorizing remains escort
Agencies may authorize the escort of remains when the employee's death occurs:
(a) While in official travel status away from the official station inside CONUS;
(b) While assigned to official duties OCONUS or in transit thereto or therefrom; or
(c) While reassigned away from the actual place of residence under a mandatory mobility agreement.