Title: How Unpaid Leave Impacts Your Benefits
Article Snip: "...You won’t earn any annual or sick leave for a pay period in which you reach a total of 80 hours of LWOP. However, you will earn annual and sick leave during the following pay periods until you once more accumulate 80 hours of LWOP. Then your ability to earn sick or annual leave will end. If you are a part-time employee, the amount of leave you earn will be proportionately less..."
Reference: www.fedweek.com