If OPM issues a “Federal Office Closed” announcement and you are covered under a written telework agreement and approved for ad hoc telework, you are required to telework on the effective day of the announcement, as required by the written telework agreement. If you are not covered under a written telework agreement, you will not be required to telework and will be granted excused absence. If you are covered under an ad hoc telework agreement and do not telework, you have the option to request unscheduled leave.