31 U.S.C. § 1514 - U.S. Code - Unannotated Title 31. Money and Finance § 1514. Administrative division of apportionments

(a) The official having administrative control of an appropriation available to the legislative branch, the judicial branch, the United States International Trade Commission, or the District of Columbia government, and, subject to the approval of the President, the head of each executive agency (except the Commission) shall prescribe by regulation a system of administrative control not inconsistent with accounting procedures prescribed under law. The system shall be designed to--

(b) To have a simplified system for administratively dividing appropriations, the head of each executive agency (except the Commission) shall work toward the objective of financing each operating unit, at the highest practical level, from not more than one administrative division for each appropriation affecting the unit.