How many emergency management disaster drills are required per year in a healthcare occupancy?

[References:, , Centers for Medicare and Medicaid Services (CMS), Emergency Preparedness Rule – State Operations Manual, Appendix Z (Hospitals) – annual exercise requirements., , The Joint Commission, Emergency Management (EM) standards – requirement for two emergency exercises annually., , AHA/CHFM Exam Content Outline – Compliance domain (emergency management requirements).]