Buckley to transition to LeaveWeb 4.0 Published Jan. 28, 2013 460th Space Wing Public Affairs BUCKLEY AIR FORCE BASE, Colo. -- Buckley Air Force Base will soon migrate from an older version of the Air Force LeaveWeb system to an upgraded version, LeaveWeb 4.0. The update is scheduled to occur Jan. 31 for Team Buckley members. Highlights for LeaveWeb 4.0 include the ability to process all 18 types of leave in a central system and mandating digital signatures for all requesting and approving levels of military leave. Airmen who experience issues inputting leave and requiring immediate assistance with leave requests or returning from leave during the transition period should contact their unit leave monitor or the finance office.