Advance payments or evacuation payments terminate when the agency determines that —

(a) The employee is assigned to another duty station outside the evacuation area;

(b) The employee abandons or is otherwise separated from his or her position;

(c) The employee's employment is terminated by his or her transfer to retirement rolls or other type of annuity based on cessation of civilian employment;

(d) The employee resumes his or her duties at the duty station from which he or she was evacuated;

(e) The agency determines that payments are no longer warranted; or

(f) The date the employee is determined to be covered by the Missing Persons Act (50 App. U.S.C. 1001 et seq.), unless payment is earlier terminated under these regulations.