; or (B) at the Heritage Center for the National Museum of the United States Army at Fort Belvoir, Virginia. . 1006. Revisions to working-capital funds statute Section 2208(l)(3) of title 10, United States Code, is amended by adding at the end the following: The dollar limitation in the preceding sentence on advance billing of a customer of a working-capital fund shall not apply with respect to advance billing for humanitarian assistance or for relief efforts following a declaration of a major disaster or emergency under the Robert T. Stafford Disaster Relief and Emergency Assistance Act ( 42 U.S.C. 5121 et seq.). . 1007. Access to and use of military postal service by U.S. citizens employed overseas by the North Atlantic Treaty Organization who perform functions in support of military operations of the Armed Forces of the United States Section 406 of title 39, United States Code, is amended by adding at the end the following new subsection: (c) The Secretary of Defense may authorize the use of Armed Forces post offices in overseas locations by United States citizens who are employed by the North Atlantic Treaty Organization when such citizens perform functions in support of the Armed Forces of the United States and when the Secretary makes a written determination that it is in the best interests of the Department of Defense and that such a grant is otherwise authorized by applicable host nation law or agreement. No funds may be obligated or expended to establish, maintain, or expand an Armed Forces post office for this purpose. . 1008. Permanent authority of Secretary of Transportation to issue non-premium aviation insurance (a) In general Section 44310(b) of title 49, United States Code, is repealed. (b) Technical amendment Section 44310(a) of title 49, United States Code, is amended by striking (a) In general .— . 1009. Extension of authority for Secretary of Defense to use Department of Defense reimbursement rate for transportation services provided to certain non-Department of Defense entities Section