When NIH announces that offices are closed, does this mean that I will automatically receive excused absence (administrative leave)?

When NIH offices are closed, Tier I employees are required to arrive at their worksite for their tour of duty on time unless otherwise directed by their supervisor. Tier II employees whose written telework agreements stipulate that they will telework during office closures are required to telework or request unscheduled leave. Tier III employees prohibited from working due to the closure, delayed arrival, or early dismissal will be granted excused absense.