Section 630.506 - Minimum unit(a) When an employee moves between positions under subchapter I of chapter 63 of title 5, United States Code, in different agencies, only his leave in whole hour units may be transferred.(b) When an employee moves between positions under subchapter I of chapter 63 of title 5, United States Code, covered by different leave charging systems within the same agency, his leave is transferable in accordance with paragraph (a) of this section, unless the agency establishes a different policy making fractions of an hour of leave transferable.38 FR 18446, July 11, 1973; 38 FR 26601, Sept. 24, 1973