5 U.S. Code § 5701

5.U.S. Code § 5701 is about Definitions. It is under Subchapter I (Travel And Subsistence Expenses; Mileage Allowances) of Chapter 57 (Travel, Transportation, And Subsistence) of Subpart D (Pay and Allowances) of Part III (Employees) of Title 5 (Government Organizations and Employees) of the Code.

Except as otherwise provided in section 5707(d),[1] for the purpose of this subchapter—

(1)“agency” means—
(A)an Executive agency;
(B)a military department;
(C)an office, agency, or other establishment in the legislative branch;
(D)an office, agency, or other establishment in the judicial branch; and
(E)the government of the District of Columbia;
but does not include—
(i)a Government controlled corporation;
(ii)a Member of Congress; or
(iii)an office or committee of either House of Congress or of the two Houses;

(2)“employee” means an individual employed in or under an agency including an individual employed intermittently in the Government service as an expert or consultant and paid on a daily when-actually-employed basis and an individual serving without pay or at $1 a year;

(3)“subsistence” means lodging, meals, and other necessary expenses for the personal sustenance and comfort of the traveler;

(4)“per diem allowance” means a daily payment instead of actual expenses for subsistence and fees or tips to porters and stewards;

(5)“Government” means the Government of the United States and the government of the District of Columbia; and