Computing lengths of service.
CFR · 2024-01-01 · US · Title 5
(a) The smallest unit of time that OPM will calculate in computing a formula in a court order is a month, even where the court order directs OPM to make a more precise calculation. (b) If the court order states a formula using a specified simple or decimal fraction other than twelfth parts of a year, OPM will use the specified number to perform simple mathematical computations.
official document · source cfr-2024 · id 5:§ 838.441