5 U.S. Code § 6332
5 U.S. Code § 6332 is about General authority. It is under Subchapter III (Voluntary Transfers Of Leave) of Chapter 63 (Leave) of Subpart E (Attendance and Leave) of Part III (Employees) of Title 5 (Government Organizations and Employees) of the Code.
Notwithstanding any provision of subchapter I, and subject to the provisions of this subchapter, the Office of Personnel Management shall establish a program under which annual leave accrued or accumulated by an employee may be transferred to the annual leave account of any other employee if such other employee requires additional leave because of a medical emergency.