5 U.S. Code § 5912
5.U.S. Code § 5912 is about Quarters in Government owned or rented buildings; employees in foreign countries. It is under Subchapter II (Quarters) of Chapter 59 (Allowances) of Subpart D (Pay and Allowances) of Part III (Employees) of Title 5 (Government Organizations and Employees) of the Code.
Under regulations prescribed by the head of the agency concerned and approved by the President, an employee who is a citizen of the United States permanently stationed in a foreign country may be furnished, without cost to him, living quarters, including heat, fuel, and light, in a Government owned or rented building. The rented quarters may be furnished only within the limits of appropriations made therefor.