You are eligible for a househunting trip expenses allowance if you are an employee who is authorized to transfer, and in addition:

(a) Both your old and new official stations are located within the United States;

(b) You are not assigned to Government or other prearranged housing at your new official station; and

(c) Your old and new official stations are 75 or more miles apart (as measured by map distance) via a usually traveled surface route.