41 C.F.R. § 303-70.1

Agencies must authorize payment of expenses when the employee, at the time of death, was:

(a) On official travel status away from the official station;

(b) Performing official duties OCONUS or in transit;

(c) Reassigned away from their actual place of residence under a mandatory mobility agreement;

(d) In direct support of or directly related to a military operation, including a contingency operation, or an operation in response to an emergency declared by the President as provided in § 303-70.600; or

(e) Performing official duties as determined by the head of agency and was a covered employee as provided in § 303-70.700.