According to The Joint Commission Emergency Management Standards, a facility must

The Joint Commission Emergency Management Standards require organizations to evaluate their capabilities and plan for how they would maintain operations during an emergency for up to 96 hours. This does not mandate stockpiling or guaranteeing resources for that duration, but rather ensuring that the facility has assessed its resources, strategies, and agreements to maintain patient care and safety during prolonged emergency conditions.

Incorrect Options:

A and B: Maintaining actual supplies/utilities for 96 hours is not specifically required.

C: Agreements with vendors may be part of the plan but are not the mandated standard.