May I use LWOP (Leave Without Pay) on a day when unscheduled leave is announced by OPM?

Three of OPM’s operating status announcements state that an employee may “use” LWOP on a day when unscheduled leave is announced. You must request LWOP and it must be approved by your supervisor. OPM’s procedures do not create an automatic entitlement to use LWOP when the option for unscheduled leave is made available.